above the roof or ground to avoid taking the accumulated layer
of hot air into the outdoor unit.
Provide an adequate structural support.
The unit may be installed at ground level on a solid base that
will not shift or settle, causing strain on the refrigerant lines and
possible leaks. Maintain the clearances shown below and
install the unit in a level position. Isolate the base from the
structure to avoid noise or vibration transmission.
When installing units on a roof, the structure must be capable
of supporting the total weight of the unit, including a pad, lintels,
rails, etc., which should be used to minimize the transmission
of sound or vibration into the conditioned space.
Isolate the unit from rain gutters to avoid any possible wash out
of the foundation.
Normal operating sound levels may be objectionable if the unit
is placed directly under windows of certain rooms (bedrooms,
study, etc.).
THERMOSTAT
NEC CLASS 1
WIRING
WEATHERPROOF
DISCONNECT SWITCH
NOTE: ALL OUTDOOR WIRING MUST
BE WEATHERPROOF
TO POWER
SUPPLY
12" REAR
AND SIDES
TO
BLOWER
MOTOR
RELAY
TO
COIL
SEAL OPENING(S) WITH PERMAGUM OR EQUIVALENT
24" SERVICE
ACCESS
CLEARANCE
48" OVERHEAD
NEC CLASS 2
WIRING
Sit unit on
rubber
elevator
grommets
to reduce
noise and
allow for
proper
drainage.
FIGURE 1- TYPICAL INSTALLATION
MODEL
H2DH024
H2DH030
H2DH036
H2DH042
H2DH048
H2DH060
UNIT SUPPLY VOLTAGE
208/230-1-60
NORMAL VOLTAGE RANGE (1)
187 to 252
MIN. CIRCUIT AMPACITY
12.4
16.1
21.5
23.9
30.4
37.5
MAX. OVERCURRENT DEVICE AMPS (2)
20
25
30
35
40
60
COMPRESSOR AMPS
RATED LOAD
9.3
12.2
16.0
17.9
23.1
28.8
LOCKED ROTOR
57.0
67.0
87.0
87.0
105.0
169.0
CRANKCASE HEATER
YES
NO
YES
YES
YES
NO
FAN MOTOR AMPS
RATED LOAD
0.8
0.8
1.5
1.5
1.5
1.5
LOCKED ROTOR
1.4
1.4
2.8
2.8
2.8
2.8
MIN. FIELD WIRE SIZE AWG
60
°
C COPPER CONDUCTORS
12
12
12
10
8
8
MAX. WIRE LENGTH FEET
BASED ON 3% VOLTAGE DROP
208V
117
110
110
126
130
108
230V
130
125
125
140
145
120
FAN DIAMETER INCHES
18
18
24
24
24
24
FAN MOTOR
RATED HP
1/8
1/8
1/4
1/4
1/4
1/4
NOMINAL RPM
1050/ 2-SPD 1050/ 2-SPD 850/ 2-SPD
850/ 2-SPD
850/ 2-SPD
850/ 2-SPD
NOMINAL CFM
1900
1900
3100
3100
3100
3100
COIL
FACE AREA SQ. FT.
17.0
17.0
23.5
23.5
23.5
23.5
ROWS DEEP
1
1
1
1
2
2
FIN / INCH
20
20
16
16
16
16
LIQUID LINE OD
3/8
3/8
3/8
3/8
3/8
3/8
VAPOR LINE OD
3/4
3/4
3/4
7/8
7/8
7/8
OPERATING WEIGHT LBS.
157
160
225
238
280
290
(1) Utilization range “A” in accordance with ARI standard 110.
(2) Dual element fuses or HACR circuit breaker.
TABLE 1 - PHYSICAL AND ELECTRICAL DATA
550.36-N2Y
2
Unitary Products Group
