Features and technical data
Installation, use and maintenance manual – GAHP-AR
15
1
GAHP-AR
Cooling capacity
nominal (2)
kBtu/hr
16.9
GUE
nominal (2)
%
67
Cold water outlet temperature
minimum
°F
37.4
Cold water inlet temperature
maximum
°F
113
minimum
°F
42.8
Water flow rate
nominal (ΔT = 9 °F)
GPM
12.8
maximum
GPM
14.1
minimum
GPM
11.0
ΔT
nominal
°F
9
Pressure drop cooling mode
at nominal water flow
Feet of Head
psig
10.46
4.5
Ambient operating temperature
nominal
°F
95
maximum
°C
120
minimum
°C
32
Condenser air flow (3)
nominal
CFM
6000
minimum
CFM
2000
Electrical specifications
Power supply
voltage
V
208-230
type
-
single-phase
frequency
Hz
60
Condenser fan motor (variable speed in cooling
mode)
HP
-
1/2
nominal ampacity
full load / locked rotor
A
3.1 / 6.2
Oil pump motor
HP
-
0.35
nominal ampacity
full load / locked rotor
A
2.03 / 7.7
Premix blower motor
HP
-
1/50
nominal ampacity
full load / locked rotor
A
0.55 / 0.75
Total electrical operating consumption (4)
unit only
kW
0.75
Minimum circuit ampacity (MCA)
unit only
A
8.0
Maximum over current protection (MOCP)
A
10.9
Installation data
Gas consumption
natural gas (nominal)
CFM
1.60 (5)
Water content inside the apparatus
gallons
0.79
Water fitting
thread
FPT
1 1/4
Gas connection
thread
FPT
1/2
Flue gas exhaust
diameter (Ø)
“
3 1/8
residual head
inch WC
0.048
Dimensions
width
“
33 1/2
depth
“
48 1/2
height
“
50 3/4 (6)
Weight
in operation
pounds
838
shipping
pounds
883
General information
Cooling fluid
ammonia R717
pounds
15.7
water H
2
O
pounds
22.0
(1)
Heating capacity at standard conditions of 44.6 °F ambient temperature (dry bulb). Outlet water temperature 122 °F, inlet 104 °F.
(2)
Cooling capacity at standard conditions of 95 °F ambient temperature (dry bulb). Outlet water temperature 45 °F, inlet 55 °F.
(3)
Fan speed is reduced when external temperature is less than 91.4 °F
(4)
±10% according to the power supply voltage and tolerance on electrical motors consumption. Measured at outdoor temperature of 86 °F.
(5)
HHV (natural gas) 1014 BTU/CU.FT.
(6)
Overall dimensions excluding fumes pipes.
1.7.1
Pressure drops
Heating
Table 1.2
Heating mode pressure drop
Water flow rate
Outlet water temperature
GPM
122.0 °F
104.0 °F
86.0 °F
ft of head
ft of head
ft of head
6.60
3.05
3.08
3.15
7.04
3.30
3.32
3.35
7.48
3.58
3.62
3.65
7.93
3.89
3.98
4.05
8.37
4.25
4.35
4.42
8.81
4.64
4.76
4.86
9.25
5.05
5.19
5.28
9.69
5.50
5.66
5.77
Water flow rate
Outlet water temperature
GPM
122.0 °F
104.0 °F
86.0 °F
ft of head
ft of head
ft of head
10.13
5.96
6.18
6.29
10.57
6.45
6.66
6.83
11.01
6.95
7.16
7.39
11.45
7.47
7.68
7.97
11.89
7.99
8.21
8.57
12.33
8.52
8.76
9.18
12.77
9.06
9.32
9.80
13.21
9.59
9.90
10.43
13.65
10.12
10.50
11.07
14.09
10.64
11.11
11.72
14.53
11.36
11.81
12.60
14.97
11.98
12.48
13.35
15.41
12.63
13.17
14.12
15.85
13.29
13.87
14.91
