PROSELECT PSHT90, PSHT30, PSHT60, PSHT15 Installation Manual

HYDRONIC EXPANSION TANKS

DESCRIPTION

PROSELECT hydronic expansion tanks are designed to
accommodate the natural expansion of water in a hydronic (forced
hot water) heating system. When water heats up, it expands and in
a closed system can cause unsafe operating pressures and
nuisance operation of the boiler relief valve. These tanks are not to
be used in open or potable (domestic) water systems. The air and
water is permanently separated in a PROSELECT tank by a 100%
butyl rubber diaphragm.

THIS IS THE SAFETY ALERT SYMBOL. IT IS USED TO
ALERT YOU TO POTENTIAL PERSONAL INJURY
HAZARDS. OBEY ALL SAFETY MESSAGES THAT
FOLLOW THIS SYMBOL TO AVOID POSSIBLE INJURY,
DEATH, OR PROPERTY DAMAGE.

WARNING

INDICATES A POTENTIALLY HAZARDOUS SITUATION
WHICH, IF NOT AVOIDED, COULD RESULT IN
SERIOUS INJURY OR DEATH AND/OR SIGNIFICANT
PROPERTY DAMAGE.

Installation and Operation

Instructions

PSHT Series

WARNING

This product must be installed by a Qualified Professional following
all local and national plumbing and
understand fully the instructions included here and those on the
PROSELECT website which are updated on a regular basis. This
product must be inspected annually by a qualified professional for any
signs of corrosion or leakage and replaced immediately if these signs
are present. Failure to follow these instructions may result in serious
injury, death and/or property damage and will void the product
warranty.

WARNING

maximum pressure of 100 psi and a maximum temperature of 240 F.
A properly sized pressure relief valve set to local code must be
installed on the system. This tank is shipped with a pre-charge of
12 psi and any adjustment to the pre-charge must be done prior to
installation and at ambient temperature. Do not adjust the pre-charge
of this tank if the product is corroded or damaged or shows any signs
of diminished integrity. Do not adjust the pre-charge of the expansion
tank with the system under pressure. Failure to follow these instructions
is UNSAFE and may result in serious injury or death and or property
damage.

WARNING

installed in a location that allows for easy access, visual inspection and
where water leakage will not cause property damage. Installation must

a means

include
in a location
vertical
responsible for any water damage associated with the installation and/
or failure of this product. Failure to follow these instructions will void
the warranty and may result in personal injury, death and/or property
damage.

for adequate

that is subject to freezing. This tank must be installed

position.

WARNING

use may be dangerous and void the warranty. This product’s
performance and lifespan can be significantly and adversely impacted
by aggressive water conditions. A water test should be conducted at
regular, periodic intervals specifically looking for corrosive water, acids
and other relevant water contaminants which, if present, must be treated
immediately and appropriately. The system piping must be properly
grounded to earth and a dielectric union is recommended in the
installation. Failure to follow these instructions may result in
serious injury or death and/or property damage.

EXPLOSION HAZARD This expansion
tank is designed for water storage at a

This expansion tank and the associated
piping will in time leak. This tank must be

draina

The manufacturer of this

This tank is not intended for use
on potable water systems and any other

electrical codes. Read and

ge. This tank must not be installed

in the

product is not liable or

Manufactured for/Fabriqué pour/Fabricado para: PL Sourcing, Inc. PO. Box 2778 Newport News, VA 23609 Made in/Fabriqué en/Hecho en: Taiwan.

BeFore InstallatIon

product InspectIon

Visually inspect the product for any signs of damage that may have occurred during transportation. If the tank is dented,
bent or scratched, return the product to the original purchase point for replacement.

pre-cHarge adjustment

This expansion tank is shipped from the factory with a pre-charge of 12 psi. Any adjustments to the factory pre­charge must be done prior to initial tank installation and with 0 psi pressure on the system. DO NOT ADJUST THE
PRE-CHARGE OF THE EXPANSION TANK WITH THE SYSTEM UNDER PRESSURE!

The expansion tank should be pre-charged to match the boiler fill valve setting. Failure to properly adjust the pre-

charge will shorten the life expectancy of the product.

to adjust tank precHarge

Remove the protective cap from the air valve.

•

Check the tank pre-charge pressure using a standard tire pressure gauge.

•

If required add air to the tank using a manual bicycle tire pump until the proper pre-charge pressure is reached.

•

Replace the protective cap on the air valve.

•

In s ta ll a tI on

1. Drain boiler system or isolate the area where expansion

tank will be installed.

2. Install expansion tank on supply side of the boiler, on the

suction side of the circulator. Adequate thread sealant

(pipe dope) must be added to ensure a leak free

installation.

3. Connect system piping to discharge opening of the tank

using a tee, air scoop, or other suitable tapping in the

system.

4. Pressurize the system and check for leaks.

5. Restart the boiler system.

WARNING

The tank is designed to be supported by the system piping. Make
sure that there is adequate means of supporting the system
piping and if necessary add strapping, brackets or pipe hangars.
DO NOT INSTALL THIS EXPANSION TANK IN THE HORIZONTAL
POSITION.

TYPICAL INSTALLATIONS

Air

Auto Fill

Valve

Inlet

PSHT
SERIES

Separator

P.O.

Air

Pressure

Relief
Valve

Vent

Flow

Check

To
System

In Line
Expansion

(2)