QUICKDRAW
®
Steam Heater
7
3. Connect condensate trap inlet parallel to or below the outlet of the heat exchanger. The ability to lift
condensate via steam pressure cannot be assured on QuickDraw products due to the possible use
of a modulating steam valve (storage units only) or multiple solenoid steam control system. The
recommended methods of condensate distribution are:
a. Plumb to a condensate receiver and pump or vacuum return to the condensate return header.
b. Plumb to a pneumatic/electric actuated condensate pump trap for return to the condensate
return header.
c. Drain to atmosphere – (would require constant make-up of boiler water).
Inadequate drainage of condensate can adversely affect heat transfer and limit the performance of
the water heater. Please note damage to the water heater attributed to poor condensate drainage is
not
covered in the product warranty.
STEAM VALVES
Two position on-off electric valves are used. The valves will return to the closed position when power is
off. This feature will prevent an excessive temperature buildup in the event of a power failure. The valve
manufacturer’s operation and maintenance instructions ship with the unit. Refer to these instructions
during start-up and file for future referencing on maintenance.
CAUTION: Most valve problems are caused by dirt or trash in the steam line. This is most likely
to occur during installation. Teflon pipe tape, pipe joint compounds, metal particles and dirt will
clog up strainers and orifices and prevent valve seats from closing. Clean all pipe line strainers
at start-up and check the valves again after a few days operation as recommended maintenance
by the valve manufacturer. Inspection of strainers and blowdown piping should be part of the
normal maintenance routine on this equipment.
START-UP PROCEDURE
1. When placing the unit into operation, open relief valve to purge air from top of tank and begin to fill
the tank with cold water. Check for plumbing leaks. Be sure to fill the tank completely before closing
the relief valve.
CAUTION: Do not energize the heater or circulating pump until the tank is full of water. Serious
damage may result.
2. Push control switch, located on the control box, to activate the steam valve and thermostats. Check
steam valve for operation; the valve solenoid should “click” to open valves when operating switch is
pushed “on”. The tank-circulating pump should also operate. Check thermostat settings. The
temperature-limiting device is set at 200
°
F.
Temperature Setting:
The operating thermostat is set at the factory at approximately 120°F and
the upper operating thermostat is set at approximately 130°F. Make adjustments by turning the
thermostat dial to the desired temperature.
3. Push the operating switch, located on the control box, to “off” before opening manual main steam
supply valve. This will allow condensate that has collected in the supply line to drain through the
trap installed in front of the steam valve. When the steam supply line is free of condensate, push
operating switch to “on”, opening the electric on-off steam valves allowing steam to flow through the
heat exchanger.
4. Do not operate unit under conditions in excess of those specified on nameplate.
