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50TA/TZ/TY/YZ 40TA/TZ/TY/BZ-38TA/FZ/TY/BZ Electric Heaters NOTE: This manual refers to accessories and options with „D“ as the final letter in the ordering code. Installation instructions 1 - SAFETY CONSIDERATIONS Installation, servicing and maintenance of air conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, start-up or service air conditioning equipment. Untrained personnel can perform the basic maintenance functions of cleaning and replacing filters. All other operations should be performed by trained service personnel. When working on air conditioning equipment, observe precautions in the manual and stickers on the unit and other safety precautions that may apply locally, regionally and nationally, as well as all applicable laws. C - If the unit is already installed and connected to the air discharge duct, this must be cut in accordance with the depth of the heater so that this can be installed. Next attach the duct to the heater. D - The heater thermal protection devices must always be located in the upper part, whatever the position of the heater control box. E - The heater must be fixed to the unit as shown in the following figures: Fig. 4: View of the electric heater Fig. 5: View of the indoor fan outlet panel Fig. 6: View of the installation of the heater in the unit Fig. 1 - Front view Follow all safety codes. Wear safety glasses and work gloves suitable for the work carried out. Disconnect the unit electrically at the main switch before carrying out any work inside the unit. All procedures that do not require unit operation, as well as all cleaning and maintenance operations must be done with the unit de-energised. WARNING: Before performing service or maintenance operations on the unit turn off the main power switch to the unit. Electric shocks could cause serious injuries. 2 - RECEIVING THE ELECTRIC HEATER Air intake filter Fig. 2 - Side view: Unit with indoor fan situated on top of the panel Electric heater 2.1 - Inspect the shipment Inspect the shipment to check for transport damage. If there are signs of damage the transport managers must inspect the component before it is installed. Immediately file a claim with the shipping company or note the damage in the shipping documents. The manufacturer is not responsible for damage incurred during transport. Check that all components listed on the shipping documents have been supplied. If any item is missing, immediately inform the nearest Carrier office and make a note on the shipping documents. To prevent damage and/or loss keep all components in their original packaging until they are installed by qualified personnel. 3 – UNIT INSTALLATION The electric heaters (accessory/option) are supplied for installation in the units and have not been factory-installed; they must be installed as described in this manual. The manual only applies to heaters with the ordering code ending in the letter „D“ (e.g. X40TY04B09D (50TY/YZ 024 with 1.5 kW capacity). A - The electric heaters are always installed outside the unit and are fixed to the panel of the indoor fan air discharge, as shown in Figs. 1, 2 and 3. B - Whether the unit is installed or not, the heater must be attached by fixing it to the panel of the indoor fan outlet, using the four threaded sheet metal screws supplied with the heater. The electric heater is installed so that the control box is above or below depending on the position of the indoor fan air discharge outlet (see Figs. 2 and 3).  Indoor fan air discharge panel Indoor fan Unit Air flow Control box Fig. 3 - Side view: Unit with indoor fan situated below the panel Indoor fan Control box Electric heater Unit Air flow Fig. 4 - Electric heater (front view) Thermal switches F - Changing the electric heater control box from its standard position as supplied to the alternative position is possible if the indoor fan air discharge is located in the lower part of the casing. Proceed to change the control box position so that it is located in the upper part when mounted in the unit (see Fig. 3). Figs. 4, 5 and 6 show the heater with the control box in the lower part and the thermal switches in the upper part. To change the position it is enough to remove the four screws that secure the frame of the electric heaters and the thermal switches as shown below. Fig. 7 Thermal switches Fig. 5 - Fan panel (front view) Control box Fig. 8 The electric heater must be fixed to the discharge air panel. Align holes 1 of the heater with holes 1 of the panel. Secure the heater as shown in Fig. 6, using the screws supplied. Fig. 6 - View of the unit and electric heater Once the electric heater frame and the thermal switches have been disconnected, turn the heater 180°, removing the strip that covers them. Insert the thermal switches in the hole below the control box so that the manually reset thermal switch is accessible. Gather the connection cables from the heaters and thermal switches so that they are protected and hidden by the frame that has been removed. Re-insert the screws that were previously removed. 1 Holes and fixing points of the electric heater to the unit, with fixing screws. The control box and the thermal switches must be located in the same zone of the heater, contrary to what is shown in Figs. 4 and 7 so that they can be installed in the unit when the fan is located with its air discharge section in the lower part of the unit (Fig. 3).  4 - ELECTRIC HEATER CAPACITIES (kW) The electric heater capacities for cooling models or additional heater capacities for heat pumps, according to valid Carrier publications, are: Table 1 – Cooling only models Unit 50TA/TZ 024 38TA/FZ-40TY/BZ 024 50TA/TZ 036-048 38TA/FZ-40TY/BZ 036-048 50TA/TZ 060 38TA/FZ-40TY/BZ 060 50TA/TZ 072 and 084 38TA/FZ-40TY/BZ 072 38TA/FZ-40TY/TZ 084 Capacity, kW 4.0 or 4.6 6.0 or 9.0 9.0 or 13.5 12.0 or 18.0 Table 2 – Heat pumps Unit 50TY/YZ 024 38TY/BZ-40TY/BZ 024 50TY/YZ 036-048 38TY/BZ-40TY/BZ 036-048 50TY/YZ 060 38TY/BZ-40TY/BZ 060 50TY/YZ 072 and 084 38TY/BZ-40TY/BZ 072 and 084 Capacity, kW 1.5 or 2.0 IMPORTANT: Whenever the electric heater power supply is downstream of the unit main disconnect switch (Figs. 9, 10 and 11) it is not permitted to install a heater of higher capacity (kW) than indicated in tables 1 and 2, that are the standard heaters. C - If the unit has been installed and an electric heater is to be connected whose control power supply is not connected via the main unit disconnect switch or if it is desirable to have an independent power supply connect and protect it as follows: - Cables of adequate wire section - Fuses F1 with a current that complies with the heater capacity (kW) installed. - A bipole or tripole disconnect switch, depending on the voltage with the necessary current (A). - Locate a thermal-magnetic disconnect switch with current (A) in accordance with tables 3 and 4 in the electric heater control box, as described in chapter 5.2. Standard heater connection 3.0 Fig. 9 4.5 6.0 To the unit Supplied with the voltages indicated in the price list, technical data, wiring diagrams and applicable manuals. 5 – ELECTRICAL CONNECTIONS Electric heating Before the definitive installation of the electric heaters in the unit a number of operations must be carried out. Fig. 10 5.1 – Power supply The electric heater power supply is suitable for connection to the unit control and power wiring box and to the general disconnect switch of the unit. To the unit The disconnect switch in the cooling only and heat pump units is designed to support the current (A) of the components connected to it. Electric heating Therefore the power supply of the electric heaters must be connected downstream of the disconnect switch, as shown in the unit wiring diagrams (see Figs. 9, 10 and 11). Possible connections: A - If the electric heater has not been installed and must be incorporated, fuses F1 and the power cable section (L1, L2, L3, N) are sufficient for the maximum power consumption in cooling and heating modes. B - If the unit has been installed and supplied with the electric heater incorporated please check if fuses F1 and the power cable section (L1, L2, L3, N) are sufficient for the new power consumption. Remember that the unit will operate in heating mode when the electric heater is installed. Cooling only models = indoor fan plus electric heater power consumption Heat pump models = compressor plus indoor and outdoor fan plus electric heater power consumption.  Fig. 11 To the unit Electric heating Legend: Q1 - F1 - ----- ----- Unit main disconnect switch (incorporated) Fuses to be field-supplied by the installer Wiring in the unit Field wiring NOTE: The unit main disconnect switch has been designed to support the current (A) of the electric heaters that are installed. It is not necessary to change it. 5.2 – Thermal-magnetic disconnect switch Fig. 13 The following thermal-magnetic disconnect switches must be incorporated in the electric heater control box (curve C). The current must comply with the capacity (kW) of the electric heater installed. The thermal-magnetic disconnect switches are as follows and match the models and capacities of the electric heaters in tables 3 and 4. Table 3 – Cooling models F18 installation site Power supply V-ph-Hz Letter in wiring diagram 50TA/TZ – 38TA/FZ – 40TA/TY/TZ/BZ 024 036 042048 060 072 084 16 16 16 25 25 32 25 32 - - - - - 25 40 - 50 50 6 6 9 6 9 9 13.5 12 18 230-1-50 4 6 - - - - 230-3-50 - 6 9 - 12 18 400-3-50 230-1-50 F18 thermalmagnetic switch (A) 230-3-50 400-3-50 R3 electric heater total (kW) Table 4 – Heat pumps Power supply V-ph-Hz Letter in wiring diagram 400-3-50 F18 thermalmagnetic switch (A) 230-1-50 230-3-50 400-3-50 230-1-50 R3 electric heater total (kW) 230-3-50 024 036 042048 060 072084 6 10 10 10 16 16 16 - - - - 16 16 16 20 1.5 3 3 4.5 6 2 3 - - - - 3 3 4.5 6 These thermal-magnetic switches are located in the control box of the electric heater, as shown in figures 12 and 13. Thermal switch 5.3 - Power supply cables This manual refers to packaged units. The power supply cables used for split system vary, units depending on the distance between the indoor and outdoor units (maximum voltage loss 5%). The standard cables for the power supply in packaged units are: Fig. 14 - 230 V single-phase heaters with 2, 3, 4 and 6 kW capacity 50TY/YZ – 38TY/BZ – 40TY/BZ Fig. 12 Once installed in the control box, they must be connected to contactor K8 in accordance with the wiring diagram. Afterwards they must be connected to the main unit control box with the power supply cables. Dimensions, mm kW A 2 and 4 3000 3 and 6 3200 Wire section, mm2 kW L1 N 2 and 3 2.5 2.5 2.5 4 4 4 4 6 6 6 6 Colour code: L1 = Black N = Blue = Green/yellow striped 2 = Flexible pipe, type PG 13.5  Fig. 15 - 230 V three-phase or 400 V three-phase heaters with 1.5, 3, 4. 5, 6, 9, 12, 13.5 and 18 kW capacity 5.4 – Power wiring cable The connection cable between the electric heater control box and the unit control box must be connected to ensure control during operation. Cables corresponding to the unit wiring diagram must be connected between terminals 14, 19, 5 and 12 of the terminal strip in the electric heater control box and in the unit control box. For the packaged 50TA/TY units these have the following characteristics: Fig. 17 Dimensions, mm 50TA/TZ 50TY/YZ kW A 024 1.5-6 3000 036-060 3-4, 5-6, 9-13.5 3900 072-084 6, 12, 18 5000 Wire section, mm2 kW 230 V, 3 ph 400 V, 3 ph L1, L2, L3 L1, L2, L3, 1.5 1.5 1.5 3 1.5 1.5 4.5 2.5 1.5 50TA/TZ 50TY/YZ A 6 4 1.5 024 3300 9 6 2.5 036-060 3900 12 10 4 072-084 5000 13.5 10 4 18 16 6 Colour code: L1, L2, L3 = Black = Green/yellow striped 2 = Flexible pipe, type PG 13.5 for all capacities except 12 and 18 kW – these are type PG 16 NOTE: The wire section is suitable for ambient temperatures below 50°C. NOTE: All data applies to packaged units. For split system units the data depends on the distance between indoor and outdoor units. These cable assemblies must be run from the thermal-magnetic switch of the electric heaters inside the control box to the power and control box for the unit, as shown in the unit wiring diagrams. Cable Ⓐ, Fig. 16, is taken out of the casing conduit of the electric heater control box Ⓐ, Fig. 18, and passed through a conduit using the pre-punched hole in panel Ⓒ. Fig. 16  Dimensions, mm 1 Number of the connection terminal and cable 2 Cables: Section = 1 x 1 mm2 Colours: No. 5 and 12 = Grey No. 14 = Black No. 19 = Blue 3 Flexible pipe, type PG 7 4 Terminals: Flag type (4 off) Flag terminal protector (4 off) Rod type, 0.75-1 mm2 (4 off) Cables Ⓒ are taken out of conduit Ⓑ (Fig. 18) and run to the unit power and control box through pre-punched hole Ⓓ, as shown in Figs. 16, 18 and 19. Fig. 18 Fig. 19 5.5 – Thermal protection The electric heater includes two thermal protection devices, one with manual reset and the other with automatic reset. The first one must always remain accessible and both must be located in the upper part of the electric heater. Once connected, this is in the air discharge of the indoor fan. NOTE: The heating coil assemblies (accessory/option) can be supplied with all required connection parts (thermal-magnetic switches, cables etc.). In this case only the installation in the panel shown and the electrical connection as shown in the wiring diagram are required. If the electric heater is supplied installed in the unit, no additional operation is required, except in split system units where the connection cables between the electric heater in the indoor units must be run to the power and control box in the outdoor unit. NOTE: This manual refers to accessories and options with „D“ as the final letter in the ordering code. WARNING: The power supply must always meet applicable local, national and EU standards.  Fig. 20 - Wiring diagram for the connection of the electric heaters (models 50TA/TZ/TY/YZ, 38TA/FZ/TY/BZ, 40TA/TZ/TY/BZ) To the unit control box Unit terminals To the unit control box Power wiring connection, common for all voltages and models 230 V/1 ph ~/50 Hz version 400 V/3 ph ~/50 Hz version (available with 230 V/3 ph ~/50 Hz on request) Legend F18 - Thermal-magnetic switch to be installed in the electric heater control box (if not in the electric heater). K8 and K12 - Contactors R3 - Electric heaters F20 - Thermal switch with manual reset F21 - Thermal switch with automatic reset _____ - Wiring included -------- - Wiring field-supplied NOTE: If the electric heater is installed in the unit the existing jumper between terminals 5 and 12 in the control box must be removed once it is installed (see wiring diagram). (Refer to the unit wiring diagram that is supplied with the unit.) Order No: 15050-20, 05.2007 - Supersedes order No: 13452-76, 10.2006 Manufacturer reserves the right to change any product specifications without notice. Manufacturer: Carrier, Spain. Printed in the Netherlands on chlorine-free paper.