6.WATER SUPPLY - Required Criteria
A. WATER SUPPLY USING THE SADDLE VALVE FURNISHED WITH UNIT. Important! See page 14.
Installation instructions for the saddle valve are printed on the plastic bag containing the saddle valve and its components. Tap into a 1/2” or 3/4” domestic cold water line. Avoid connecting to water lines from a Reverse Osmosis system or De-ionized water systems. The supply water must read a minimum of 25 ppm in order for the Steam unit to reliably sense the water.
NOTE: Never install the saddle valve on the bottom of the water pipe. Sediment in the water pipe may clog the saddle valve. Flush the line before connecting to the unit. When
tightening the hex compression nut, tighten only enough to
assure there are no leaks.
NOTE: Saddle valves do not meet plumbing codes in some areas. A “T” fitting with a valve may be required to meet code or, if low water pressure causes frequent water alerts on the steam humidifier. NOTE: Flush the new water line before connecting it.
NOTE: The use of City water or Municipal water is preferred. Softened water is preferred over untreated well water. Specify
the Optional WFA-195 disposable water filter for treating
any water supply that is very high in mineral content.
NOTE: Use a water hammer arrester (WH-100) if water spikes occur (pipes bang)during fill ups.
B. OVERFLOW & DRAIN LINES - Required Criteria
The use of an overflow line and drain line is always required.
Use the supplied 1/2” ID high temperature hose. Slip the hose over the 1/2” OD “T” drain fitting and use a hose clamp to secure. Route the hose to a suitable drain, avoiding kinks, traps and sharp objects. DO NOT route the hose above the humidifier. Failure to install all necessary drain lines may result in water leaks during normal operating conditions, and voids all warranties.
When routing the S2000 drain hose into a condensate pump, be sure to cut the end of the hose at a sharp angle to prevent the hose from bottoming out in the pan. It could result in poor draining or no draining at all. Failure to do so may result in water backing up into the S2000 reservoir and eventual overflow. See Figure 5.
DRAIN
CORRECT HOSE INCORRECT
CONDENSATE
PUMP
X
FIG. 5
7. MOUNTING THE STEAM HUMIDIFIER
Use gasket material to seal where the front plate or tank flange contacts the duct-work. Place the humidifier reservoir into the opening in the duct and secure with eight (8) sheet metal screws.
NOTE: If the duct-work will not support the unit in a level position with the water pan full of water, the duct-work must be reinforced. Both steam models weigh approximately 9 Lbs. empty and approximately 15 Lbs. when full of water.
8. STEAM OPERATION - Required Criteria
Because of the high output of this Humidifier, it must not be operated without the blower operating. The steam humidifier is designed to be "Dominant" over the HVAC System Blower. The "System" Blower will be operated by the humidifier when the water tank temperature reaches 170 degrees F.Aminimum of 800 cfm @ 800-900 fpm is required for proper operation of the steam humidifier. Lower velocities may result in excessive condensation inside the duct. See Air Proving Feature on the next column! See Variable Speed on Page 7.
A temperature sensor is mounted in the water reservoir of the humidifier. As the water temperature increases to about 170 degrees F, the computer closes a set of blower relay contacts to start the system fan. When the water cools to about 140 degrees F, the computer will open the relay contacts to shut off the fan. This operational sequence drastically decreases the chances of condensation occurring inside the duct-work.
9. WIRING THE STEAM HUMIDIFIER
IMPORTANT: Dedicated fused circuits and outlets of the proper voltage and current ratings must be provided. Use a NEMA 5-20R receptacle for the S2000 and a NEMA 6-15R receptacle for the S2020.All wiring must conform to local and national codes. Failure to do so will void all warranties.
DO NOT cut off the grounded plug and/or hard wire this unit to
line voltage! DO NOT use extension cords to operate this unit!
Doing so will void all warranties.
A. INSTALLINGAND WIRING THE HUMIDISTAT
A humidistat, such as the Model #072000 is required to control the Steam Humidifier. The humidistat may be installed on the wall in the living space or on the return air duct. NOTE:
Continuos fan operation should be initiated if the humidistat is installed on the return air duct! Instructions for installation are packaged with each humidistat. Follow wiring instructions carefully!
DO NOT connect any foreign voltage to the “H” terminals of the humidifier! The Humidifier supplies it’s own control voltage. Simply connect the two “H” terminals straight to any dry contact humidistat terminals. If you are using a 3rd party Humidistat that has powered terminals, you must use an isolating relay to operate the Steam Humidifier. Failure to do so will result in circuit board failure and will void all warranties.
B. FIELD WIRING
Schematics on the following pages describe the suggested interlock wiring arrangement for different HVAC systems. Interlocking may be performed on systems that provide a 24vac NEC Class 2 terminal block for system control.
AIR PROVING FEATURE: The Steam Humidifier has an integrated air proving feature that allows the user to install a sail switch and/or high humidity switch in the duct and easily achieve fail safe shutdown in the event of fan/blower failure. This feature prevents the Steam Humidifier from operating unless adequate airflow is proven thereby avoiding a saturated duct condition. WARNING: It is highly recommended to use an airflow proving device. In particular Duct-Board applications should always use an airflow proving device.
A factory jumper wire is provided and must be removed when connecting the sail switch or other field supplied air flow proving device. Leave the jumper in place if you decide not to use the airflow proving feature.
IMPORTANT NOTE: If the Steam Humidifier is removed and disconnected from the system, the blower interlock circuit must be restored to it's original configuration. Failure to do so may result in loss of blower operation during cooling modes!
