Filter
Top Products
Hot Water Can Scald!
• Consumer Product Safety Commission and
some states recommend domestic hot water
temperature of 130°F or less.
• When installing an automatic mixing valve,
selection and installation must comply with
valve manufacturer’s recommendations
and instructions.
• Water heated to a temperature suitable for
clothes washing, dish washing and other
sanitizing needs will scald and cause injury.
• Children and elderly, infirm or physically
handicapped persons are more likely to be
injured by hot water. Never leave them
unattended in or near a bathtub, shower or
sink. Never allow small children to use a hot
water faucet or draw their own bath. If anyone
using hot water in the building fits this
description, or if state laws or local codes
require certain water temperatures at hot
water faucets, take special precautions:
— Install automatic mixing valve set
according to those standards.
— Use lowest practical temperature setting.
— Check water temperature immediately after
first heating cycle and after any adjustment.
Studies have indicated that
dangerous bacteria can form in
potable water distribution systems if certain
minimum water temperatures are not
maintained. Contact local health department
for more information.
To pipe tankless heater:
1. Size piping no smaller than tankless heater
inlet and outlet.
2. Following controls (furnished by others) must
be installed:
a. Automatic mixing valve. See FIGURE 12.
(Read at left.)
b. Flow regulating valve. Size according to
intermittent draw of tankless heater. See
Table below. Follow valve manufacturer’s
instructions to install.
3. Additional anti-scald devices may be
installed at each hot water faucet, bath and
shower outlet.
4. In hard water areas, soften cold domestic supply
water to heaters to prevent lime build-up.
* To avoid supplying steam to system during summer tankless operation,
raise water level to one inch above normal water line.
* * Gallons of water per minute heated from 40°F to 140°F with 200°F
boiler water temperature. Tested in accordance with I=W=H Testing and
Rating Standard for Indirect Tankless Water Heaters Tested with Boilers.
Connect Tankless Heater Piping
TANKLESS HEATER RATINGS TABLE
SGO-3 35-S-29 3.25 ¾"
SGO-4 35-S-29 3.50 ¾"
SGO-5 35-S-29 3.75 ¾"
SGO-6 35-S-29 4.00 ¾"
SGO-7 35-S-29 4.00 ¾"
SGO-8 35-S-29 4.00 ¾"
SGO-9 35-S-29 4.00 ¾"
BOILER
MODEL
NUMBER *
INTERMITTENT
DRAW RATINGS
(GPM) * *
HEATER
NUMBER
INLET
AND OUTLET
TAPPING SIZES