Carrier CPHEATER001A00 User manual

Cancels: IIK 555A-18-27 IIK 555A-18-31
6/1/97
Installation Instructions
Part Numbers: CPHEATER001A00 thru CPHEATER020A00
CONTENTS Page
SAFETY CONSIDERATIONS ...................1
GENERAL ...................................1
INSTALLATION .............................1-20
Heater Installation (Horizontal Airflow
Configuration) .............................1
Heater Installation (Vertical Airflow
Configuration) .............................3
High-Voltage Connection to Unit ..............4
• WIRING HEATER SEPARATE FROM BASE UNIT
• WIRING HEATER AS A SINGLE POINT POWER
CONNECTION
ADJUST THERMOSTAT ......................20
SERVICE ...................................20
SAFETY CONSIDERATIONS
Installing and servicing air-conditioning equipment can be
hazardous due to system pressure and electrical compo-
nents. Only trained personnel should install or service air-
conditioning equipment.
When working on air-conditioning equipment, observe pre-
cautions in the literature and on tags and labels attached
to unit. All electrical wiring should be done by a licensed
electrician.
Follow all safety codes. Wear safety glasses and work gloves.
Have a fire extinguisher available.
Before performing service or maintenance operations on
system, turn off all main power switches. There may be
more than one disconnect. Turn off accessory heater power
switch if applicable. Electrical shock can cause per-
sonal injury. TAG DISCONNECT SWITCH(ES) WITH
A SUITABLE WARNING LABEL.
GENERAL
These instructions cover the installation of field-installed
accessory electric heater packages for Electric Cooling Units
and Heat Pumps.Accessory electric heater packages are avail-
able from 5 to 20 kW. Consult Table 1 and Fig. 1 for pack-
age contents.
Table 1 — Accessory Electric Heater Kit Contents
ITEM QTY
Heater Assembly 1
Control Box 1
Wiring Label 1
Wire Tie 3
Screws 6
Safety Shield 1
Speed Nut Clips 2
Dual Ground Lug 1
Power Lugs 3
INSTALLATION
Heater Installation (Horizontal Airflow
Configuration)
1. Refer to unit Installation Instructions for complete unit
installation details. The minimum air quantity for safe elec-
tric heater operation is shown in Tables 2A and 2B.
IMPORTANT: When using accessory electric heat
and flexible ductwork, it is recommended that a sheet
metal sleeve be installed inside the first 12 in.
(304.8 mm) of the duct.
2. Remove blower/control box access panel. See Fig. 2.
3. Remove the electric heater and control box assembly from
packaging. Route the accessory electric heater low-
voltage control wires through the back of the unit control
box. See Fig. 3. Using wire tie provided in kit, route and
secure the accessory electric heater low-voltage wires with
the unit low-voltage wires.
4. Install electric heater control box by engaging the back
of the heater control box with the slots in the back of the
unit control box. Secure with the screws provided. See
Fig. 4.
5. Install heater assembly to blower-side plate. Ensure that
the tabs on the heater assembly engage the slots closest
to the indoor coil on the blower housing. See Fig. 5.
Secure heater assembly with screws provided in kit. See
Fig. 6.
6. Route and secure high-voltage wires as shown in Fig. 7.
7. Connect low-voltage control circuit wiring in the low-
voltage connection box on the unit by making proper elec-
trical connections. See Fig. 8-11.
Small Packaged Products
Electric Cooling and Heat Pump Units
Unit Sizes 018-060
Accessory Electric Heat and Single Point Box
50/60 Hz
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1144
Tab 1b5a5a6b PC 111 Catalog No. 535-087 Printed in U.S.A. Form 50H,S-10SI Pg 1 6-97 Replaces: 50H,S-7SI

POWER
PLUGS
WIRE TIES SPEED
NUT CLIPS SCREWS
DUAL
GROUND
LUG
CONTROL BOX
HEATER
ASSEMBLY
Fig. 1 — Accessory Heater Package
Fig. 2 — Blower/Control Box Access Panel
CONTROL WIRING
HOLE
DUAL GROUND
LUG
LOW-VOLTAGE
CONTROL WIRES
INSTALLATION SLOTS
Fig. 3 — Accessory Electric Heater Control Wiring
SECURING SCREWS
CONTROL BOX
Fig. 4 — Accessory Electric Heater Control Box
Installation
SLOTS FOR HEATER ASSEMBLY
BLOWER HOUSING
Fig. 5 — Blower Housing
HEATER
ASSEMBLY
SECURING SCREWS
NOTE: Blower in horizontal discharge application.
Fig. 6 — Heater Assembly Installation
2

Table 2A — Minimum Airflow for
Electric Heater Operation; 60 Hz
UNIT
TYPE
MINIMUM AIRFLOW (Cfm)
Unit Size
018 024 030 036 042 048 060
HEAT PUMP 700* 800 1000 1300 1300 1600 1750
ELECTRIC
COOLING 700* 700 875 1200 1225 1400 1750
*Not applicable to High Efficiency units.
Table 2B — Minimum Airflow for
Electric Heater Operation; 50 Hz
UNIT
TYPE
MINIMUM AIRFLOW (L/s)
Unit Size
024 030 036 048 060
HEAT PUMP 338 472 614 755 826
ELECTRIC
COOLING 330 413 567 661 826
Heater Installation (Vertical Airflow
Configuration)
1. The unit must first be converted to vertical airflow con-
figuration before the electric heater package is installed.
Refer to unit Installation Instructions.
NOTE: If heat pump units have already been factory con-
verted to vertical airflow configuration, skip to Step 6.
2. Remove blower/control box access panel. See Fig. 2.
3. Disconnect indoor-fan motor leads from indoor-fan re-
lay and unit contactor. Disengage wire tie securing wires
to the unit control box. See Fig. 12.
4. Remove indoor blower assembly. Remove screws
securing the filler bracket and relocate filler bracket to
vertical airflow application as shown in Fig. 13.
5. Remove the blower assembly support bracket. The screws
securing the support bracket can be accessed by remov-
ing the condenser side grille. Discard support bracket
and retain screws. Using the 2 speed nut clips provided
with the kit, reinsert the screws through the partition and
tighten to ensure watertightness. See Fig. 13.
6. Remove the electric heater and control box assembly from
packaging and remove safety shield from heater tray.
See Fig. 14.
7. Remove the plug holding the heater wiring bundle to
the heater tray, being careful not to damage wiring. Loosen
nuts on the heater terminals that hold the heater power
leads and ring terminals in place. See Fig. 15. Rotate the
wiring 180 degrees, so that the heater power leads now
leave in the opposite direction from the heater tray. Tighten
the nuts holding the heater power leads and ring ter-
minals. Secure wire tie by inserting it into the engage-
ment hole in heater tray.
8. Mount the safety shield over the limit switches using
2 screws provided. See Fig. 16.
9. Mount the electric heater assembly onto the indoor blower
housing. Insert the tabs on the heater assembly into the
slots closest to the blower wheel inlet. Secure to hous-
ing with 2 screws provided in kit. See Fig. 17.
10. Orient blower housing for vertical airflow and slide into
vertical opening, making sure the flanges on the blower
side plates engage the tabs in the unit basepan. When
the blower housing is near final position, resistance will
be felt as the blower housing contacts the basepan in-
sulation. This resistance can be overcome by applying a
slight force to the base of the blower. Continue sliding
blower until hole in side plate flange aligns with the hole
in the basepan. Secure blower to unit using screws re-
moved in Step 5.
11. Install electric heater control box by engaging the tabs
back of the heater control box with the slots in the back
of the unit control box. Secure the heater control box
using the screws provided.
SECURE
HIGH-
VOLTAGE
BUNDLE
HERE
LOW-
VOLTAGE
CONNECTION
SPLICE BOX
Fig. 7 — Accessory Electric Heater
Low-Voltage Wiring
Fig. 8 — Low-Voltage Wiring, Single-Stage
Electric Heaters
3

12. Reconnect indoor-fan motor leads (refer to Tables 2A
and 2B for minimum cfm [L/s] required for accessory
electric heater operation to determine indoor-fan motor
speed when connecting leads) and reinsert wire tie into
unit control box. Secure wires to control box. See
Fig. 18.
13. Connect low-voltage control circuit wiring in the low-
voltage connection box on the unit by making proper
electric connections. See Fig. 8-11.
High-Voltage Connection To Unit — Unit wiring
must be in compliance with the National Electrical Code (NEC,
U.S.A. Standard) and any applicable local codes. Wiring la-
bel included with Accessory Electric Heater Kit should be
attached to base unit adjacent to base unit wiring label.
The accessory electric heater can be wired either sepa-
rately from the unit, or as one single point connection.
Determine which wiring method will be used, and follow
the correct installation procedure.
WIRING HEATER SEPARATE FROM BASE UNIT
1. Size wire for base unit and heaters per NEC. Refer to
unit Installation Instructions for wire sizing. Refer to
Tables 3A and 3B for electric heater wiring sizing and
connection diagram.
2. Run high-voltage leads for the base unit and electric heat
through the appropriate inlet hole in the duct panel, and
through the high-voltage raceway to the control box.
3. Using lugs provided, connect power supply to leads from
unit and electric heater as shown in power connection
diagram. See Fig. 19. Insulate lug. Refer to Tables 3A
and 3B for the correct power connection diagram. (Refer
to proper connection diagram — Fig. 20-25.)
4. Install dual ground lug using green ground screw in con-
trol box. See Fig. 3. Connect ground leads from base
unit power supply and electric heater supply to ground
lug.
5. Using field-supplied connectors, connect base unit power
supply to base unit power leads.
6. Replace blower/control box access panel and restore power
to the unit.
Fig. 9 — Low-Voltage Wiring, Two-Stage
Electric Heaters
Fig. 10 — Low-Voltage Wiring, Single-Stage
Heat Pump Units
Fig. 11 — Low-Voltage Wiring, Two-Stage
Heat Pump Units
WIRE TIE TO BE
DISENGAGED
Fig. 12 — Indoor-Fan Motor Leads
4

BLOWER ASSEMBLY
SUPPORT BRACKET RELOCATED FILLER BRACKETAND SCREWS
Fig. 13 —Vertical Discharge Opening With
Insulation and Cover Removed
Fig. 14 — Electric Heater and
Control Box Assembly
RING TERMINAL
CONNECTIONS
ROTATED 180 DEGREES
FROM ORIGINAL
HEATER SAFETY SHIELD
(FOR VERTICALAIRFLOW
INSTALLATION)
Fig. 15 — Rotation of Heater Terminals
Fig. 16 — Safety Shield Mounted
Fig. 17 — Electric Heater Assembly Mounted on
Blower Housing
WIRE
TIE
NOTE: Blower in vertical discharge application.
Fig. 18 — Heater Assembly Installed in Unit
5