Install Instructions

8
4. When the water supply pressure is higher than 70
psig, it is recommended to install a pressure reducing
valve on cold water supply line to prevent water loss
through T&P relief valve.
5. If water heater will replace tankless coil in boiler,
disconnect piping to coil. Allow water to drain from
coil. Do not plug tankless coil.
I. THERMOSTATIC MIXING VALVE
1. It is recommended to install an optional mixing valve
on the domestic hot water outlet.
2. Mixing valve should comply with ASSE 1017.
J. RECIRCULATION PIPING
1. T&P relief valve must be installed in run (straight
through leg) of tee located at domestic hot water
outlet of water heater.
2. It is recommended that the recirculation dip tube be
installed in auxiliary connection using a close nipple
assembly as shown Fig. 3.3, page 9. See Table 1.1
page 6 for diameter and length of dip tube.
3. A stainless steel or bronze circulator is recommended.
4. Install automatic mixing valve either at the hot water
outlet of water heater or each hot water faucet.
K. MULTIPLE WATER HEATER SYSTEMS
1. Parallel Pipe Recirculation Systems - Manifold
recirculation return to all water heaters.
2. Series Piped Systems - Piped return to the leading
(cold water inlet) water heater.
3. Install automatic mixing valve either at the hot water
outlet of water heater or each hot water faucet.
L. BOILER PIPING
1. If plastic pipe is used for boiler water piping, it must
have a maximum oxygen diffusion rate of 0.1
mg/liter-day for boiler and water heater protection.
2. Boiler water (including additives) must be practically
non-toxic, having toxicity rating or class of 1, as listed
in Clinical Toxicology of Commercial Products.
If antifreeze is used in boiler system, local codes may
require a backflow preventer on cold water supply
line. Use antifreeze specifically intended for hydronic
heating systems. Inhibited propylene glycol is
recommended at a maximum 50/50 mixture.
WARNING
Do not use automotive, ethylene glycol or petroleum-
based antifreeze. Do not use any undiluted
antifreeze. This can cause severe personal injury,
death or substantial property damage.
DANGER
Plugging tankless coil inlet and outlet will result in
severe personal injury, death, or substantial property
damage.
Do not apply heat to the cold water inlet when
making sweat connections to water heater. Sweat
tubing to adapter before fitting adapter to cold water
inlet of heater. It is imperative that no heat be applied
to the cold water inlet, as it contains a non metallic
dip tube.
NOTICE
The Peerless
®
Partner
®
IDWH must be installed on a
closed type hydronic system. Failure to provide such
a system will result in premature failure of the outer
tank and annulment of warranty.
NOTICE
DANGER
Failure to install automatic mixing valve where
recommended will result in severe personal injury or
death.
INSTALLATION - PIPING