Carrier 50RQ900291 - Manual

Number One
AirConditbning
Maker
e
Division of Carrier Corporal io
installation Instructions
50P§-
006,008,010
Carrier Parkway • Syracuse, N Y 13201
Accessory Emergency Heat
Package 50RQ900291
Single-Package Heat Pumps
INSTALLATION
General —The accessory emergency heat package
may be installed on any 50RQ,PQ unit. The
package consists of a control box assembly con­
taining the following components'
1 Emergency Heat Terminal Block HY84FC117
1 Heater Relay (HR-1) HN61KK324
1 Heater Relay (HR-2) HN61KL016
1 Outdoor Air Thermostat (OAT.) HH22QA040
One or 2 additional outdoor thermostats may be
installed if required. Mount additional thermo-
stat(s) in the control box as follows:
f. Remove control box cover.
2. Remove thermostat barrier (See Fig. 1).
FIELD CONTROL WIRING
SEALTITE CONDUIT
THERMOSTAT
BARRIER
OUTDOOR AIR
THERMOSTAT
LOCATION
NO
N02
N0 3
EMERGENCY HEAT____
CONTROL BOX
CAPILLARIES
COMPRESSOR ACCESS
PANEL CORNER POST
Fig. 1 — Accessory Emergency Heat
Control Box Installation
3. Attach additional thermostat(s) to barrier using
field supplied 8-32 machine screws. Using field
supplied wire, connect the additional thermo-
stat(s) to control box components as shown in
Fig. 2.
4. Replace barrier in control box.
5. Using screws taped to control box mounting
plate, secure control box to compressor access
panel corner post (see Fig. 1 and 3).
6. Using field supplied wire, connect the control
box to the conditioned space and base unit. For
50RQ,PQ006 units, wire in accordance with
Fig. 4, for 50RQ,PQ008/010 units, wire in
accordance with Fig. 5. Enclose wiring in
field-supplied conduit as required. Conduit to
be “Sealtite” or equal. There are 2 conduit
connection holes in bottom of control box.
Use 1 hole for wiring entering the control box
from the conditioned space and the other for
all wiring leaving the control box to the base
unit. (Note: A portion of the wiring is routed in
1 hole and directly out the other and is not
connected to the control box terminal block).
See Fig. 1 and Fig. 3.
Outdoor Thermostat(s) — A 3-ft capillary tube
connects the thermostat bulb to the thermostat
body. If space is available inside of control box and
control box is not in direct sunlight, capillary tubes
may be left in box. For best performance, locate
capillary tube(s) outside of box. Pull 1- to 2-in. of
capillary tubing thru the rubber grommet in
bottom of control box, neatly bend tubing and
locate under control box. Bulb(s) must not be in
direct sunlight. Bulb(s) must be in a shaded
location to sense true outdoor temperature. Shield
bulb(s) with suitable field supplied material if
required. An outdoor thermostat is required for
each stage of heat. This instruction covers 2 stages
of heat for the 50RQ,PQ units. Three stages of
heat are available for 39 Kw heat only. If 3 stages
of heat are required, contact the Carrier represent­
ative for appropriate installation instructions.
Refer to building heat load calculations for
correct thermostat setting
© Carrier Corporation 1977 Form 50RQ-6SI