63
4. A 1/8” NPT tap is provided on the inlet
side of the gas valve to the heater. A fitting
suitable for connection to a pressure gauge
capable of measuring gas pressure should be
connected to each heater serviced by a
single regulator so that gas pressure at each
heater can be measured with all heaters in
operation.
5.
A drip leg (sediment trap) and a manual
shut off valve must be provided immediately
upstream of the gas control on the heating
unit. To facilitate servicing of unit,
installation of a union is recommended.
Figure 33 - Sediment Trap for Gas Heat
Duct Furnace Component Identification
Figure 34 –Gas Heater Horizontal
Configuration
Horizontal Airflow Configuration
1. Airflow may be from either right or left
for heater as shown, without any difference
in system performance.
2. Typically no condensate drain attachment
is necessary in “Heat” only applications.
Condensation should not occur during
heating cycle. However, in applications
operating at low temperature rise or with
50% or more outside air, condensation may
occur early in the heating cycle. In these
applications connection of a condensate
drain line is recommended, to avoid
1. When pressure testing at 1/2 psi or
less, close the manual shutoff valve
on the appliance before testing.
2. When pressure testing gas supply
line at 1/2 psi or higher, close manual
gas valve and disconnect heater from
supply line to be tested. Cap or plug
the supply line.
1. All field gas piping must be
pressure / leak tested prior to
operation. NEVER use an open flame
to check for leaks. Use a soap
solution or other leak detecting
solution for testing.
2. Gas pressure to appliance controls
must never
exceed 13.5” w.c. (1/2
psi)
WARNING
WARNING
Summary of Contents for M2 Series
Page 2: ......
Page 5: ...5 Split System Piping Diagrams 98 M2 Series Startup Form 115 Maintenance Log 121 ...
Page 35: ...35 Table 1 Electric and Gas Heating Capacities ...
Page 38: ...38 Figure 5 M2 Series Unit Four Point Lifting ...
Page 39: ...39 Figure 6 M2 Series Unit Eight Point Lifting ...
Page 58: ...58 Figure 32 Supply Fan Banding ...
Page 95: ...95 Figure 52 Filter Layout Viewed from the Upstream Side of the Cooling Coil ...
Page 98: ...98 Split System Piping Diagrams Figure 53 A C Split System Piping Suction Down ...
Page 99: ...99 Figure 54 A C Split System Piping Suction Up ...
Page 100: ...100 Figure 55 A C with LAC Split System Piping Suction Up ...
Page 101: ...101 Figure 56 A C with Modulating Hot Gas Reheat Split System Piping Suction Down ...
Page 102: ...102 Figure 57 A C with Modulating Hot Gas Reheat Split System Piping Suction Up ...
Page 103: ...103 Figure 58 A C with Hot Gas Bypass Split System Piping Suction Down ...
Page 104: ...104 Figure 59 A C with Hot Gas Bypass Split System Piping Suction Up ...
Page 107: ...107 Figure 62 Heat Pump Split System Piping Suction Down ...
Page 108: ...108 Figure 63 Heat Pump Split System Piping Suction Up ...
Page 109: ...109 Figure 64 Heat Pump with Modulating Hot Gas Reheat Split System Piping Suction Down ...
Page 110: ...110 Figure 65 Heat Pump with Modulating Hot Gas Reheat Split System Piping Suction Up ...
Page 111: ...111 Figure 66 Heat Pump with Hot Gas Bypass Split System Piping Suction Down ...
Page 112: ...112 Figure 67 Heat Pump with Hot Gas Bypass Split System Piping Suction Up ...