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16
Fig. 21 — Completing Installation of Thru-the-Base
Option
Fig. 22 — Gas Line Piping
Other hardware required to complete the installation of the gas
supply line will include a manual shutoff valve, a sediment trap
(drip leg) and a ground-joint union. A pressure regulator valve
may also be required (to convert gas pressure from pounds to
inches of pressure). The manual shutoff valve must be located
within 6 ft (1.83 m) of the unit. The union, located in the final
leg entering the unit, must be located at least 9-in. (230 mm)
away from the access panel to permit the panel to be removed
for service. If a regulator valve is installed, it must be located a
minimum of 4 ft (1220 mm) away from the unit’s flue outlet.
Some municipal codes require that the manual shutoff valve be
located upstream of the sediment trap. See Fig. 23 and 24 for
typical piping arrangements for gas piping that has been routed
through the sidewall of the curb. See Fig. 25 for typical piping
arrangement when thru-base is used. Ensure that all piping
does not block access to the unit’s main control box or limit the
required working space in front of the control box.
Fig. 23 — Gas Piping
Fig. 24 — Gas Piping
Fig. 25 — Gas Piping Thru-Base Connections
GASKET
CONNECTOR
PLATE
ASSEMBLY
3
/
4
-in NPT
STREET
ELBOW
THRU-BASE
GAS FITTING
GAS
SUPPORT
BRACKET
9” (229mm) min
Union
Shut Off
Valve
Drip
Leg
Thru-Curb Adapter
Unit Base Rail
Drip
Leg
S
h
u
t Off
V
a
lve
Union
Thr
u
-C
u
r
b
Ad
a
pter
B
u
rner
Acce
ss
P
a
nel
9
”
(229mm) min
Unit B
as
e R
a
il
Summary of Contents for WeatherMaster 48HC14
Page 5: ...5 Fig 2 Unit Dimensional Drawing 14 Size Unit ...
Page 6: ...6 Fig 2 Unit Dimensional Drawing 14 Size Unit cont ...
Page 9: ...9 Fig 4 Roof Curb Details ...
Page 25: ...25 Fig 48 48HC 14 Controls Wiring Diagram 208 230 v 460 v 575 v ...
Page 26: ...26 Fig 49 48HC 14 Power Wiring Diagram 208 230 v 460 v ...
Page 27: ...27 Fig 50 48HC 14 Power Wiring Diagram 575 v ...
Page 29: ...29 Fig 53 Typical Humidi MiZer Adaptive Dehumidification System Humidistat Wiring ...
Page 44: ...44 Fig 62 48HC14 ComfortLink Control Wiring Diagram ...
Page 45: ...45 Fig 63 48HC14 ComfortLink Power Wiring Diagram ...
Page 46: ...46 Fig 64 48HC14 ComfortLink with Humidi MiZer Power Wiring Diagram ...