Leslie Controls NYC Heat Exchanger - Manual (Page 18)

Page 18 of 25
Water
temperature
fluctuates or is
colder than
required Blockage in condensate line causing condensate to back up into
heat exchangers.
Gain adjusters not adjusted correctly Check the temperature of heat
exchanger outside casing. If top is hot
and bottom is warm or cold, shut unit
off and check draining of condensate.
Water
temperature
can not be
maintained at
120 F Solenoid valves were back pressured and solenoid plug is
blocking flow. Shut down unit, disassemble and
inspect solenoid units.
Water was drained from system and tubing to differential
pressure switch was not bled of air. Run pump and then loosen inlet
compression fitting and bleed line until
all air is out of line. Do same with
outlet compression fitting. Pump 1 or
Pump 2 Light
is lit and No
Flow light is
on. Can see
Pump is
turning and
water is re-
circulating.
New differential pressure switch installed. Run pump and then loosen inlet
compression fitting and bleed line until
all air is out of line. Do same with
outlet compression fitting. If light is
still on then adjust pressure switch
according to manufactures instructions.
UNIT SEPARATION FOR
INSTALLATION
To get unit into building may require separating the unit
into two parts. The following instructions are to be used as
a guide to separating the unit.
1. Remove steam header from the unit and place aside
protecting the flange face from damage.
2. Remove Aquastats by removing cover and loosening
clamp screw that holds thermostat to well.
Note: Thermostat can be hung off of unit but be
careful to not disturb heat conductive compound on
thermostat bulb.
3. Undo copper water supply unions.