PV500-57 06/12
6
4.5 Installation
WARNING: Use industry standard safe rigging methods when attempting to lift or move this product.
Failure to follow these instructions could result in property damage, serious injury or death. One common
method includes the use of straps and spreader bars, lifting from the water boiler base skid assembly.
1. Check the data decal on the boiler. Be sure the electrical and water supply is adequate for the installation.
2. Carefully remove all shipping supports and bracing. (Float type devices have shipping plugs blocking the float).
3. Install shut-off valves and unions on the inlet and outlet water piping for servicing. Use caution when threading
pipe nipples into tank connections to prevent cross threading, or over-tightening. Always use a back-up wrench
on tank nipples when tightening unions, valves, etc.
4. Insulate hot water and return circulation lines. Insulate cold water supply lines if subject to freezing during
shutdown periods.
IMPORTANT:
Do not use the plumbing connected to the appliance as a ground for welding or any other
purpose.
5.
The boiler is equipped with a relief valve(s) rated for the output. Pipe the relief valve discharge to a suitable
open drain. The drain pipe may not be smaller than the relief valve opening and must be secured to prevent it
from lifting out of the drain under discharge pressure. Do not install valves or restrictions in the discharge line.
6. Pipe the drain valve to a suitable open drain.
4.6 Service
Clearances
Allow sufficient space to provide adequate clearances on all sides for service and inspection. Recommended
clearance is 24” at the top and front, 18” at left and right sides of the appliance. Optional equipment may increase
the clearance requirements. Allow sufficient space for installing and servicing connections such as water, electrical,
pump and other auxiliary equipment.
4.7 Clearances to Combustible Surfaces
The appliance must not be installed on a combustible floor, or on a non-combustible floor covering combustible
material. Clearance to unprotected combustible material must be 6” minimum at top, sides and rear, and 24”
minimum in front.
4.8 Electronic Low Water Cutoff
The device consists of a probe in the tank that acts as a switch, open when submerged in water and closed when
the water level is below the probe, preventing heating elements from energizing. The probe should be kept free of
scale buildup to insure operation.
5 OPTIONAL
EQUIPMENT
5.1 Shunt Trip Circuit Interrupter
(optional on all models): The shunt trip, wired in the non-automatic circuit
interrupter, is a safety device designed to open the circuit interrupter and prevent the elements from energizing if
water level in the tank is low or if water temperature or pressure exceeds the high limit A delay relay switch is used
to delay action of the shunt trip to allow time for cover installation.
5.2 Time
Sequencer
(optional on all models): Time sequencing is optional and used in lieu of the proportional
sequencer. It is a series of time delay relays wired to the contactors which allows approximately a 40 second delay
in energizing each succeeding heating element when the controls call for heat. This prevents all heating elements
from energizing at the same time.
5.3 Proportional
Sequencer
(optional on all models): Progressive sequencing (orbital) equalizes the on time for each
contactor and heating element. The heating elements are staged on based on the demand on the boiler. The
control gives visual, indication of stages that are on. In the event of power interruption, all contactors are turned off.
When power is resumed, the control will re-stage the elements beginning with number one.
