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2 x duct height
from fan or
transition
On/Off Controls
(Air Proving)
in series between
terminal 1 and 2
Steam Line
- Adequate slope
- No restrictions
- No kinks (hose)
- Condensate traps
on long runs
Disconnect
Correct voltage,
amps, phase
Mounting
- Unit level
- Service clearance
- Properly anchored
if on stand
Min 10 ft (3 m)
Calculated absorption distance
to any obstruction or 8 - 10 ft
(2.4 - 3 m) if unknown.
P Trap(s) with 12 in .
(30 cm) min. drop(s)
.
Boiler Steam
- Max 15 psi
- Safety valve if from
Actuator,
med. or high press.
- Opens CV Valve
boiler.
fully at 100%
- Design pressure
demand
at 100% demand.
- Closes fully at 0%.
Air gap
Spec label
Boiler Condensate
- Gravity fed to boiler
or lift pump
- Wired to terminal 5
- On/Off in series
between terminal
Control
- Wired to terminal 4.
- On/Off in series
between terminal
1 and 2.
- In return duct or
location which
1/2 in line min
represents humidified
30-80 PSI
space (no drafts,
not by door, not
by diffuser).
Not plastic drain,
Not to sink.
High Limit
1 and 2
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