Bell & Gossett V57083D Diaphragm Expansion Tanks ASME And Non-Code - Manual (Page 2)

INSTALLATION INSTRUCTIONS
A. Pre-Installation
1. Inspect the expansion tank for damage.
WARNING: If the expansion tank is damaged, it
must be exchanged for a new tank. The tank could
rupture. Failure to follow these instructions could result in
serious personal injury or death and property damage.
2. For a residential potable water installation where:
a. cold water supply (CWS) pressure is less than 80 psig
and the water heater size is up to 120 gallons with an end-
ing temperature setting of up to 160°F, the air charge of
the PT-12 Model does not need to be changed.
b. cold water supply pressure (CWS) is greater than 80
psig, the air charge of the PT-12 Model must change to
equal the incoming pressure by charging the expansion
tank with oil free compressed air. Check the pressure fre-
quently during this process when filling with air to avoid
over pressurizing the tank.
WARNING: Excessive pressure can cause tank to
explode. Exercise care when filling a tank with air so
the pressure does not exceed that required or does not
exceed the working pressure of the tank as stamped on
the nameplate. Failure to follow these instructions will
result in serious personal injury or death and property
damage.
B. Installation (“PT” & “PTA” Series)
1. Install the expansion tanks on the cold water supply (CWS)
line at a point between the water heater and backflow pre-
venter, check valve or pressure reducing valve (see Figure 1).
2. Once tank is installed, fill system and check for any leak-
age. Make repairs if necessary.
3. Before the initial firing of the water heater, open a hot water
fixture and draw water until all air is removed from the sys-
tem. Turn the water heater temperature control
to desired ending temperature level (see water heater
instructions).
4. To relieve initial thermal expansion, slightly open a hot
water faucet. Continue until water heater aquastat tempera-
ture is satisfied. Once heater is at its operating range, no
further bleeding of expanded water is required.
5. The system water heater and expansion tank will now be
operational. The expansion tank will absorb pressure
increases caused by thermal expansion to a level well
below the water heater relief valve setting.
2
MAXIMUM LIMITATIONS FACTORY
MODEL NUMBER PRESSURE TEMPERATURE PRE-CHARGE
All HFT 100 PSIG (689 kPa) 240°F (115°C) 12 PSIG (83 kPa)
PT-5, PT-12, PT-25V, PT-30V, PT-42V, PT-60V,
PT-80V, PT-180V, PT-210V
150 PSIG (1035 kPa) 200°F (93°C) 40 PSIG (276 kPa)
PT-451 through PT-457 150 PSIG (1035 kPa) 240°F (115°C) 55 PSIG (379 kPa)
PTA-5, PTA-12, PTA-20V, PTA-30V, PTA-42V, PTA-60V,
PTA-80V, PTA-180V, PTA-210V
150 PSIG (1035 kPa) 200°F (93°C) 55 PSIG (379 kPa)
PTA-451 through PTA-457 125 PSIG (862 kPa) 240°F (115°C) 55 PSIG (379 kPa)
WTX-2, WTX-5 100 PSIG (689 kPa) 200°F (93°C) 18 PSIG (124 kPa)
WTX-8 100 PSIG (689 kPa) 200°F (93°C) 28 PSIG (193 kPa)
WTX-10, WTX-14, WTX-10S, WTX-14S, WTX-20S, WTX-26S, WTX-32S,
WTX-34S, WTX-44S, WTX-62S, WTX-81S, WTX-86S, WTX-119S
100 PSIG (689 kPa) 200°F (93°C) 38 PSIG (262 kPa)
WT-401 through WT-405 150 PSIG (1035 kPa) 200°F (93°C) 30 PSIG (207 kPa)
WT-421 through WT-427
100 PSIG (689 kPa) 240°F (115°C) 25 PSIG (172 kPa)
WT-447 through WT-457 150 PSIG (1035 kPa) 240°F (115°C) 25 PSIG (172 kPa)
WTA-401 through WTA-405 125 PSIG (862 kPa) 200°F (93°C) 30 PSIG (207 kPa)
WTA-447 through WTA-457 125 PSIG (862 kPa) 240°F (115°C) 25 PSIG (172 kPa)
TABLE 1
BACK FLOW PREVENTER
CHECK VALVE
RELIEF VALVE
HOT
WATER
CWS
WATER
HEATER
PT OR PTA
TANK
TYPICAL INSTALLATION
FIGURE 1