Installation Instructions

Installation Instructions
53DS---900--- --- ---093
53DS---900--- --- ---094
Duct---Free Systems
Cooling Only and Heat Pump Units
Crankcase Heater Accessory
Installation Instructions
NOTE: Read and become familiar with these instructions before
beginning installation.
SAFETY CONSIDERATIONS
Installing and servicing air--conditioning equipment can be
hazardous due to system pressures and electrical components. Only
trained and qualified personnel should install or service
air--conditioning equipment. When working on air--conditioning
equipment, observe the precautions provided in literature, tags, and
labels attached to the unit.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in
literature and attached to the unit. Consult local building codes and
National Electrical Code (NEC) for special requirements.
Recognize safety information. This is the safety--alert symbol !! .
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury.
Understand these signal words: DANGER, WARNING, and
CAUTION. These words are used with the safety--alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies hazards
which could result in personal injury or death. CAUTION is used
to identify unsafe practices which may result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability, or
operation.
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Before beginning any modification or installation of this kit,
be sure the main electrical disconnect is in the OFF position.
Ensure power is disconnected to the fan coil unit. On some
systems both the fan coil and the outdoor unit may be on the
same disconnect. Tag the disconnect switch with a suitable
warning label. There may be more than one disconnect.
GENERAL
A Crankcase Heater is required for all low ambient and long line
applications utilizing cooling only and heat pump models as shown
in Table 1.
Table 1 – Crankcase Heater Part Numbers
Models
Part No.
Voltage
38MVC/MVQ009 ---012
53DS ---900 --- --- ---093
120v
38MVC/MVQ012
53DS ---900 --- --- ---094
240v
38MVC/MVQ018 ---024
53DS ---900 --- --- ---094
240v
INSTALLATION
1. Remove access panels
2. Remove compressor blanket.
3. Wrap crankcase heater around compressor base and tighten
screw clamp.
4. Reinstall compressor blanket.
5. Route crankcase heater wires to unit control box and cut to
length (save excess wire).
6. Connect wiring in unit control box as shown in Fig. 1, 2,
and 3 using terminations provided with crankcase heater kit.
7. If the installation requires field wires (called out in Fig. 3),
they can be made by utilizing the excess wire from Step 5
along with the terminations provided with the kit.
8. Reinstall access panels.
L
L1
N
BLK
Wires located on load side of
field wiring terminal block.
L2
BLK
WHT
Crankcase heater leads cut
to length after routing from
compressor to control box.
Splice terminations provided
as part of accessory kit.
BLK
WHT
Wires located on load side of
field wiring terminal block.
Crankcase heater leads cut
to length after routing from
compressor to control box.
Splice terminations provided
as part of accessory kit.
CH
CH
BLK
BLK
BLK
A08080
A08081
Fig. 1 -- 38MVC/MVQ009 & 012 120 VOLT
Fig. 2 -- 38MVC/MVQ012 208/240 VOLT
L1
L2
RED
BLK
CAP
RED
1
2
RED
5
6
RED
BLK
21
22
BLK
RED
Field wire - made utilizing
cutoff from crankcase
heater leads and te
minations provided
as part of kit.
RED
COMP
CH
BLK
BLK
BLK
CR
Crankcase heater leads cut
to length after routing from
compressor to control box.
Terminations provided
as part of accessory kit.
A08082
Fig. 3 -- 38MVC/MVQ018 & 024 208/240 VOLT
LEGEND:
CAP =
CH
=
CR
=
COMP =
Copyright 2008 CAC / BDP S 7310 W. Morris St. S Indianapolis, IN 46231
Capacitor
Crankcase Heater
Compressor Relay
Compressor
Printed in U.S.A.
Edition Date: 02/08
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
2
Catalog No: IIK-- 53DS900-- 07
Replaces: NEW
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