Installation Instructions

HM750A1000
11 33-00289EF—01
PLUMBING
Fig. 18. Water supply and drain connection.
IMPORTANT
— Use potable water.
— All water supply and drain line connections should
be installed in accordance with local plumbing
codes.
— Drain water is automatically cooled to 160 °F
(71 °C) when HM750 cycles a drain. When an
emergency drain occurs, temperature may be
higher. The drain material (tube and drain) must
be rated for 200 °F (93 °C).
• Supply water should be between 30 and 100 PSIG. A
PRV may be used, if necessary.
• Do not use reverse osmosis or deionized water.
Supply water must be between 125-1200 μS/cm
(microsiemens/cm) for optimal performance.
• Supply water should be cold; 39.2 to 86 °F (4 to 30 °C).
• Install water shut off valve before humidifier to
facilitate servicing.
• The drain line should not end in a sink used frequently
by personnel for safety reasons, or where plumbing
codes prohibit it. Route to a floor drain or connect
directly to building drain system.
• Ensure drain line is adequately sized to provide free
and easy draining. A restricted drain can cause cylinder
water to over concentrate and result in poor operation.
• Drain line must be continuously sloped down from unit.
• If a drain is not located near the humidifier, use a
condensate pump rated for hot drain water.
Connecting the Water Supply Line
Connect water supply line (Copper or LDPE, supplied with
equipment) to the supply connection (Fig. 18). This is done
by pushing the water pipe into the quick-connect fitting.
NOTE: To remove the water supply line, the floating tip of
the fill connection is pushed in slightly, which will
release the grip on the water supply line. The
water supply line is then free to be removed.
Connecting the Drain Line
Connect drain hose (supplied with equipment) to the drain
connection (Fig. 18). Note that there is an internal air gap
in the drain, so no air gap is required external of the
humidifier. The drain line may be connected directly to the
red drain spigot using a gear clamp or similar.
Fig. 19. Proper drain hose routing (anchors not included).
3/4 (19) OD
1/4 LDPE
OR COPPER
WATER LINE
USE 1/2 IN. OD COPPER TO
WITHIN 4 FT (1.2 M) OF HUMIDIFIER.
M37187
ALWAYS INSTALL
A WATER
SHUT-OFF VALVE.
M35855