Carrier 38HD - Manual

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HEATING & COOLING
38HD
Split System Condensing Units
Installation, Start-Up and Service
Instructions
SAFETY CONSIDERATIONS
Installing and servicing air conditioning equipment
can be hazardous due to system pressure and electrical
components Only trained and qualified service personnel
should install or service air conditioning equipment.
Untrained personnel can perform basic maintenance,
such as cleaning and replacing filters. All other opera­
tions should be performed by trained service personnel.
When working on air conditioning equipment, observe
precautions in literature and on tags and labels attached
to unit
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instruc­
tions thoroughly. Consult local building codes and
National Electrical Code (NEC) for special installation
requirements
A WARNING
Before installing or servicing system, always turn off
main power to system. There may be more than one
disconnect switch. Turn off accessory heater power if
applicable Electrical shock can cause personal injury. Fig. 1 — Model 38HD
INSTALLATION
Step 1 — Complete Pre-Installation Checks.
UNPACK UNIT (See Fig 1.) — Move unit to final
location Remove carton from unit being careful not to.
damage service valves and grilles.
*
INSPECT SHIPMENT — File claim with shipping
company if shipment is damaged or incomplete.
CONSIDER SYSTEM REQUIREMENTS — Consult
local building codes and National Electrical Code (NEC)
for special installation requirements.
Allow sufficient space for airflow clearance, wiring,
refrigerant piping, and servicing unit. See Fig. 2 and 3.
Locate unit so that condenser airflow is unrestricted
on both sides. Refer to Eig 2 and 3.
Unit may be mounted on a level pad directly on base
legs or mounted on raised pads at support points See
Fig. 2 and 3 for center of gravity
CHECK ACCURATER® — The correct AccuRater
(bypass type) refrigerant control is required for cooling
system capacity optimization. An AccuRater with field-
replaceable piston (see Fig. 4) is supplied on evaporator.
Use Optimization Chart, Table 1, to find AccuRater
piston size required for condenser/evaporator system
being installed. Note that one of 2 types of AccuRaters
can be found on the indoor unit. Determine from Fig. 4
and Table 1 which type is in the indoor unit. Do r/otinter-
change eomponents between AccuRater types. Matching
of condensing unit with evaporator may require field
replacement of piston. Refer to Table 1. Replace piston,//
required, before connecting refrigerant lines. Piston
replacement
instructions are included in evaporator
installation book. After system installation is complete,
see Refrigerant Charging to check and/or adjust refrig­
erant charge
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111 Catalog No 533-850 PrintedinUSA Form38HD-1SI Pgl 6-89 Replaces: New
For replacement items use Carrier Specified Parts.
Book 1 4
Tab 3a 2a