Carrier AquaSnap 30MPA Series - Start-Up and Operation Procedures; Preliminary Refrigerant Charge

37
Table 34 — Minimum Flow Rates and Minimum Loop Volume — English
LEGEND
Table 35 — Minimum Flow Rates and Minimum Loop Volume — SI
LEGEND
START-UP AND OPERATION
Compressor crankcase heaters must be on for 24 hours be-
fore start-up. To energize the crankcase heaters, close the field
disconnect. Leave the compressor circuit breakers off/open.
The crankcase heaters are now energized.
NOTE: Refer to Start-Up Checklist on pages CL-1 to CL-8.
PRELIMINARY CHARGE (30MPA) — Refer to GTAC II
(General Training Air Conditioning), Module 5, Charging, Re-
covery, Recycling and Reclamation for charging procedures.
The 30MPA units (condenserless) are shipped with a nitro-
gen holding charge only. Leak check the 30MPA unit, dis-
charge and liquid lines, and the condenser. Be sure the liquid
line service valve is open. After leak check is completed, sys-
tem must be evacuated and dehydrated. Following the evacua-
tion, the system must be fully charged.
The liquid charging method is recommended for complete
charging or when additional charge is required.
Using the liquid charging method and charging by weight
procedure, charge the circuit with the amount of Puron refriger-
ant (R-410A) with the sum of the operating charge listed in Ta-
ble 36 for the base unit, the liquid line charge and the operating
charge of the condenser as the preliminary charge.
UNIT SIZE
FLOW RATE
NORMAL AIR CONDITIONING APPLICATION
Gal./Ton
PROCESS COOLING OR LOW AMBIENT
OPERATION APPLICATION
Gal./Ton
EVAPORATOR CONDENSER
Gal./Min Gal./Min Std Unit HGBP Digital Std Unit HGBP Digital
30MP015 22 22 12 2 N/A 12 3.4 N/A
30MP020 28 28 6 4 3 10 10 6
30MP030 43 43 6 4 3 10 10 6
30MP040 55 55 3 3 3 6 6 6
30MP045
64
64 3 3 3 6 6 6
30MP050
70
70 6 4 N/A 10 6 N/A
30MP055
77
77 6 4 N/A 10 6 N/A
30MP060
84
84 6 4 N/A 10 6 N/A
30MP065
91
91 6 4 N/A 10 6 N/A
30MP071
104
104 6 4 N/A 10 6 N/A
HGBP — Hot Gas Bypass
UNIT SIZE
FLOW RATE
NORMAL AIR CONDITIONING APPLICATION
L per kW
PROCESS COOLING OR LOW AMBIENT
OPERATION APPLICATION
L per kW
EVAPORATOR CONDENSER
L/s L/s Std Unit HGBP Digital Std Unit HGBP Digital
30MP015 1.4 1.4 13.0 8.6 N/A 13.0 13.0 N/A
30MP020 1.8 1.8 6.5 4.3 3.3 10.8 10.8 6.5
30MP030 2.7 2.7 6.5 4.3 3.3 10.8 10.8 6.5
30MP040 3.5 3.5 3.3 3.3 3.3 6.5 6.5 6.5
30MP045
4.0
4.0 3.3 3.3 3.3 6.5 6.5 6.5
30MP050
4.5
4.5 6.5 4.3 N/A 10.8 6.5 N/A
30MP055
4.9
4.9 6.5 4.3 N/A 10.8 6.5 N/A
30MP060
5.3
5.3 6.5 4.3 N/A 10.8 6.5 N/A
30MP065
5.8
5.8 6.5 4.3 N/A 10.8 6.5 N/A
30MP071
6.6
6.6 6.5 4.3 N/A 10.8 6.5 N/A
HGBP — Hot Gas Bypass
IMPORTANT: Before beginning Pre-Start-Up or Start-Up,
review Start-Up Checklist at the back of this publication.
The checklist assures proper start-up of a unit and provides
a record of unit condition, application requirements, system
information, and operation at initial start-up.
OIL SIGHTGLASS
Fig. 25 — Sight Glass Location
CAUTION
Crankcase heaters are wired into the control circuit, so they
are always operable as long as the main power supply dis-
connect is on (closed), even if any safety device is open.
Compressor heaters must be on for 24 hours prior to the
start-up of any compressor. Equipment damage could result
if heaters are not energized for at least 24 hours prior to
compressor start-up.