Loading...
HEATING & COOLING
38QP024/40RR024 Heat Pump System 50/60 Hz
Installation, Start-Up and Service Instructions
Piping Package No. 40RR900271
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 com ponents. Only trained and qualified service personnel should install or service air-conditioning equipment. When work ing on air-conditioning equipment, observe the precautions provided in literature, and on tags and labels attached to the unit.
A WARNING
Electrical shock can cause personal injury or death. Before beginning any modification or installation of this package, 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.
GENERAL
The accessory heat pump piping package is designed for use with the Carrier 38QP024 heat pump (outdoor section) in combination with the 40RR024 fan coil unit (indoor section) (see Fig. 1).
Special accessories are available for electrical control of this system. Electric heaters for the 40RR024 are a fieldinstalled accessory. Ensure that all material required for installation is available at the jobsite, including the 38QP024 outdoor section, the 40RR024 indoor section, piping pack age, electrical control package, and 40RT electric heater packages. The Sporlan part no. G8 nozzle is used for both the upper (circuit no. 2) and lower (circuit no. 1) coil sec tions of the indoor unit. Nozzles are shipped as standard parts of the factory-installed 40RR distributor. Distributor sizes are as follows:
COIL SECTION |
DISTRIBUTOR SIZE |
|
(in. OD) |
||
|
||
Upper (Ckt 2) |
7/8 |
|
Lower (Ckt 1) |
7/8 |
OUTDOOR SECTION
38QP024
INDOOR SECTION 40RR024
Fig. 1 — 38QP024/40RR024 Heat Pump System
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without Incurring obligations.
Book 11 |
PC 111 |
Catalog No 563-710 |
Printed in U.S. A |
Form 38QP-5SI |
Pg 1 |
11-92 |
Repiaces: New |
Tab 5a |
|
|
|
|
|
|
|
Accessories
PIPING PACKAGE — Contains check valves, thermo static expansion valves (TXV’s), receiver, filter driers, and tubing to connect the indoor coils for heat pump service.
THERMOSTAT HH07AT172 (HH07AT162 For Use on Celsius Scale) — Used with subbase HH93AZ174, is a 2-stage cool/2-stage heat thermostat with automatic changeover and a lockout light. There is no provision for emergency heat.
THERMOSTAT HH07AT172 (HH07AT162 For Use on Celsius Scale) — Used with subbase HH93AZ177, is a 2-stage cool/2-stage heat thermostat. This combination has all the features of HH07AT172 (HH07AT162)/HH93AZ174 plus a provision for emergency heat.
SEQUENCER PACKAGE — Can be used with this system when unloaders are added to the compressor(s). (Unloading can be applied in the cooling cycle only. Unloading can never be applied in the heating cycle.) The sequencer has 4-stage cooling capability.
ELECTRIC HEATERS — May be used with the 40RR in door unit (see Table 1). Use a maximum of four 20-kW (at 240 v) or 21.8-kW (at 480 v) electric heater assemblies.
ELECTRIC HEATER CONTROL PACKAGE 40RT900081
— Provides control for up to 3 stages of electric heat when used with outdoor-air thermostat(s). Package must be used whenever 40RT electric heaters are utilized. If a fourth stage of electric heat is used, an additional field-supplied heater control relay is necessary. This relay must have a 24-V coil with 230-v contacts. Outdoor thermostats (part no. HH22QA040) are recommended for staging elec tric heaters.
Table 1 — Unit 40RR Accessory Electric Heaters
PART NO. |
|
ELECTRIC HEATER (3 PHASE 50/60 Hz) |
||
|
Rated |
kW |
FLA |
|
|
|
Voltage |
||
|
|
|
|
|
40RT-900-101 |
|
240 |
20.0 |
48 0 |
40RT-900-111 |
|
480 |
21.8 |
26.0 |
LEGEND |
|
|
|
|
FLA — Full Load Amps
NOTES;
1. A maximum of 4 electric heaters can be used with the 40RR024 unit.
2Electric heaters are not UL (Underwriters’ Laboratories) listed for the 38QP/40RR heat pump.
WATTAGE MULTIPLICATION FACTORS
Heater Voltage |
Actual Heater |
Multiplication |
|
Voltage |
|||
Rating |
Factor |
||
(3 Phase, 50/60 Hz) |
|||
|
|
||
|
200 |
0.69 |
|
240 |
208 |
0.75 |
|
220 |
0.84 |
||
|
230 |
0.92 |
|
|
240 |
1.00 |
|
|
380 |
0.63 |
|
|
400 |
0 69 |
|
480 |
415 |
0.75 |
|
440 |
0.84 |
||
|
460 |
0.92 |
|
|
480 |
1.00 |
Example: 20.0 kW (at 240 v) heater on 230 v
=20.0 (0.92 multiplication factor)
=18.4 kW capacity at 230 v
INSTALLATION
Step 1 — Perform Outdoor and Indoor Unit Installation — Follow the installation instructions pro vided with each outdoor and indoor unit. See Table 2 for maximum vertical elevation between the indoor and out door sections.
Table 2 - Maximum Vertical Separation
|
|
HEIGHT OF INDOOR UNIT |
||||
SYSTEM |
Above Outdoor |
Below Outdoor |
||||
|
Unit |
|
Unit |
|||
|
|
|
||||
|
ft |
|
m |
ft |
|
m |
40RR024/38QP024, |
59 |
|
180 |
59 |
|
18.0 |
60 Hz, Ckt 1 and 2 |
|
|
||||
|
|
|
|
|
|
|
40RR024/38QP024, |
58 |
|
17.7 |
58 |
|
17.7 |
50 Hz, Ckt 1 and 2 |
|
|
||||
|
|
|
|
|
|
|
Step 2 — Size Piping Lines — Employ one of the following methods to size interconnecting refrigerant pip ing between the 38QP and the 40RR:
1. Use the pipe sizes shown in Refrigerant (R-22) Charge and Piping Selection table in the 38QP installation in structions (when not using field-installed accessory un loaders).
2. Use the Carrier System Design Manual, Part 3, Piping Design (when using field-installed accessory unloaders).
3. Use the piping sizing portion of the Carrier E20-II com puter program (when using field-installed accessory unloaders).
NOTE: Liquid line solenoid valves are not required; they are factory-installed on the 38QP.
Step 3 - Check Contents of Piping Package
— Install heat pump piping package to convert indoor coil for heat pump service. Table 3 lists the contents of the pip ing package. Figure 2 shows the contents of the piping pack age in the approximate order in which they are installed.
Table 3 — Heat Pump Piping Package Contents
DESCRIPTION |
QUANTITY |
|
Receiver, Piping Assy (Ckt 1) |
1 |
|
Piping Assy (Ckt 2) |
1 |
|
Filter Drier (Ckt 1 and 2) |
2 |
|
Receiver, Piping Assy Support Bracket |
1 |
|
(Cktl) |
||
|
||
Filter Drier Support Bracket (Ckt 2) |
1 |
|
TXV (Thermostatic Expansion Valve) |
2 |
|
(Ckt 1 and 2) |
||
|
||
Screw, Receiver Strap* |
1 |
|
Screws, No. 10 for Filter Drier Strap (4) |
8 |
|
5/8" Tube Clamp (2), Filter Drier Support |
||
Bracket (2)* |
|
|
Tube, Filter Drier to TXV (Ckt 1) |
1 |
|
Tube, Filter Drier to TXV (Ckt 2) |
1 |
|
Strapping, 11" Long for Filter Driers |
2 |
|
(Ckt 1 and 2) |
||
|
||
Strapping, 10" Long for Receiver (Ckt 1) |
1 |
|
Clamp for 5/8" OD Tube (Ckt 1) |
1 |
|
Installation Instructions* |
1 |
|
Strap for TXV Sensort |
2 |
|
Screw and Nut for TXV Strapt |
2 |
‘Items are included in a packet which accompanies piping package, titems are packed together with TXV.
Loading...