Chapter 2.
MOUNTING AND WIRING
2 - 1
Mounting and Wiring the Subbase
●
Mounting location
Maintain space around the control as shown below for heat radiation, and to facili-
tate mounting, removal, wiring and maintenance.
Handling Precautions
• If there is room, leave as much space as possible between the FRS and
other FRS units to allow for heat radiation.
• If ambient temperature is close to the allowable upper limit, reduce the
internal temperature of the control panel by mounting a panel cooler or a
cooling fan.
Allowable ambient temperature upper limits
• Gang-mounting: 45 °C
• Stand-alone mounting: 60 °C
5
CAUTION
Do not install where exposed to any of the following:
• Certain chemicals or corrosive gases (ammonia, sulfur, chlorine, ethylene
compounds, acid, etc.)
• Splashing water or excessive humidity
• High temperatures
• Prolonged vibration
Do not transport this device while it is mounted on a DIN rail. Remove it from
the subbase and pack it in its original box. If it is transported while on a DIN
rail, it might fall off and be damaged.
When installing and wiring, be sure to follow the instructions in this manual
and in the user's manual for the combustion equipment.
POWER
FLAME
START
LEVEL
POWER
FLAME
START
LEVEL
POWER
FLAME
START
LEVEL
Above: 50 mm min.
20 mm min.
Below: 20 mm min.
20 mm min.
Gang-mounting
(Allowable ambient temperature upper limits: 45
°
C)
Below: 20 mm min.
Stand-alone mounting
(Allowable ambient temperature upper limits: 60
°
C)
Above: 50 mm min.
20 mm min.
20 mm min.
