Carrier 50HQ - Manual (Page 8)

Table 4 — Service Data
UNIT 50HQ.VQ
R-22 CHG (Ib-oz)*
Refrig Control
T an '
Motor Rpm
(3-speed)
HEAT EXCHANGER
WATER FLOW RATE
(Gpm)
014
f-F
018 1 022 ...027 I 033 042 048 I 060
1-10 1 2-1 2-0 1 2-3 2-11 - i —
Capillary Tube
Centrifugal — Direct Drive
Diameter (in. Nom) 10 10 10 10 10 11 10
Width (in. Nom) 7 7 7 7 7 7 8
Range Cfm 400-600 500-700 600-800 750-1000 950-1200 1040-1375 1400-1800
Motor Hp 1/8 1/8 1/6 1/6 1/4 1/3 1/2
2 5-5
•Factory refrigerant charge
1075 Nominal
--- " ~ - _ — ----- - - - ‘ ■" - - - - —
3-6 4-8 4 5-9 5-10 6-12 7-14
10
10
1750-2250
3/4
8 5-17
080
12
9
2300-3000
1
1000
11 5-23
COOLING CYCLE CHARGING CHART
METHOD
1. Operate unit a minimum of 10 minutes before
checking charge, and after each charge
adjustment.
2. Measure suction pressure by attaching a gage to
unit suction service port (Schrader Fitting).
3. Measure discharge pressure by attaching a gage
to unit discharge service port (Schrader Fitting).
4. Using a sling psychrometer, measure wet-bulb
temperature of air entering unit.
5. Refer to correct Charging Chart. Locate on
curves where unit discharge pressure line and
indoor air wet-bulb temperature line intersect.
6. From intersect point, project horizontally left to
chart suction pressure line. Compare chart
suction pressure to unit suction pressure (step 2).
7. If unit suction pressure is lower than chart pres­
sure, add refrigerant to unit until chart pressure
is reached. If unit suction pressure is higher than
chart pressure, remove refrigerant until chart
pressure is reached.
150 200 250 300
COMPRESSOR DISCHARGE PRESSURE ® SERVICE PORT(PSIG)
Fig. 9 — Cooling Cycle Charging Chart
(R-22) — 50HQ,VQ014
COMPRESSOR DISCHARGE PRESSURE® SERVICE PORT (PSIG)
Fig. 10 — Heating Cycle Operation
Check Chart (R-22) — 50HQ,VQ014
COMPRESSOR DISCHARGE PRESSURE @ SERVICE PORT (PSIG)
Fig. 11 — Cooling Cycle Charging Chart
(R-22) - 50HQ.VQ018