InSinkErator H990 Installation manual

Division of Emerson Electric Co.
Racine,Wisconsin 53406, U.S.A.
In-Sink-Erator
Instant Hot Water Dispenser
Installation, Care & Use Guide
Congratulations on the purchase of your new In-Sink-Erator
instant hot water dispenser. This product is designed and
manufactured to the highest standards.
SAFETY SYMBOLS!
The warning symbol alerts you to potential hazards or unsafe
practices which could result in severe personal injury or death.
The caution symbol alerts you to hazards or unsafe practices
which could result in minor personal injury or property damage.
IMPORTANT SAFETY INFORMATION!
This product dispenses water at approximately 190˚F, which
is hot enough to cause severe burns. Caution should be exercised when
installing and using this product.Do not allow children to operate this
appliance without adult supervision.
Do not attempt to install the unit until you have read and
understand these installation guide instructions.
Under no circumstances is this product to be altered in any
way other than that which is specifically addressed in these instructions.
Doing so may void your warranty.
Do not use an electric drill to drill into metal water pipes;
doing so could result in an electrical shock hazard. If necessary, use a
cordless drill or hand drill.
Premature connection of the unit to an electrical supply could
result in a “dry start” condition, which could damage the unit and void your
warranty. The unit must be completely installed and the tank must be
completely full with water running from the dispenser before plugging the
unit in to an electrical supply. Consult these installation instructions.
Do not under any circumstances use bleach, abrasive liquids,
powders or scouring pads to clean the faucet as doing so could void your war-
ranty. Occasional cleaning with a soft cloth and warm soapy water is sufficient.
Ahot water dispenser, like any water heater, has limited life
and will eventually fail. To avoid possible property damage, a hot water
dispenser should be regularly examined for leakage and replaced when
necessary. A drain pan plumbed to an appropriate drain is suggested in those
applications where any leakage could cause property damage.
IMPORTANT WARRANTY INFORMATION!
Retain your receipts (purchase and/or installation) as these document the
start date of your 1-year warranty. In the absence of purchase or installation
receipts, your warranty is one full year from the date of manufacture.
GN/HC WATER DISPENSER H-770 WATER DISPENSER H-990 WATER DISPENSER
4.1
3.5
6.5
4.3
2.5
4.5
2.5
5.6
5.4
P/N 43142 Rev. 10/00
Dispenser head configurations covered in this installation guide.
If your dispenser head still varies, you may require another installation
guide.
WHAT YOU SHOULD KNOW BEFORE YOU BEGIN
Connecting the dispenser to your regular water supplies requires no special
plumbing. All details are covered in the installations instructions. Be sure
that the plumbing connections conform to your applicable local codes. If your
water supply contains sand, grit or other suspended particles, the use of a
filter is recommended. The filter should not result in the water pressure to
the dispenser dropping below 30 pounds per square inch (207kPa). This will
prevent your unit from operating properly.
Astandard 115-volt grounded electrical outlet is required under the sink for
the dispenser’s electrical power. The current use is 6.5 amps only when the
tank is heating. Ensure that all electrical wiring and connections conform to
applicable codes. Note: The wall outlet to your dispenser must have
power supplied to it continuously and must be fused. It should not be
controlled by the same wall switch that operates your disposer.
Personal Injury
• Dispenses 190˚F (88˚C) water which can instantly cause scalds
or burns. Use care when operating this appliance.
• Do not allow children to operate this appliance without adult
supervision.
Fire Hazard
• To minimize possibility of fire, do not store flammable items such
as rags, paper or aerosol cans near the tank. Do not store or
use gasoline or other flammable vapors and liquids in the vicinity
of this or any other appliance.
Personal Injury
• This tank is a non-pressure tank. Do not modify this system. Do
not close vent tube or connect other type faucets or valves to
the tank.
• Use only the faucet supplied.
Electrical Shock Hazard
• Disconnect power before installing or servicing unit.
• Use only a properly grounded and polarized electric outlet.
Product Damage
Do not plug unit in until tank is filled with water and water flows from spout.
These are the tools and
materials you will need
Pliers
Phillips and flat blade
screwdrivers
Adjustable wrench
115-volt grounded outlet
within 30 inches (76 cm) of
the dispenser
Cold water line within 2
feet (61 cm ) of the dis-
penser. A shutoff valve to
connect the dispenser to the
cold water line (see step 4
for examples of connections
that can be used).
These are the tools
you may need
Cordless or hand drill. If you
have galvanized water supply
pipe, you may need a non-elec-
tric drill to make a small hole.
Basin Wrench. If you intend to
use the hand sprayer hole in
your sink for your dispenser,
you may need a basin wrench
and a 1/8" plug or a 1/4" cap for
the faucet spray hose line. See
item 1 of installation instructions
for details.
Chassis punch. If you need to
punch a mounting hole in your
stainless steel sink you may
need a 1-1/4" (3.2 cm) chassis
punch.
INSTALLATION QUESTIONS?
Call the Answerline at 1-800-558-5700

wall switch

115 VAC line
Disposer outlet 
only is controlled 
by wall switch.
Use this diagram if
you are using the
same wall outlet for
the dispenser and
your disposer.
Dispenser outlet
must be independent
of wall switch
ADJUSTABLE
THERMOSTAT
FLEXIBLE
OUTLET
VENT LINE
16" MAXIMUM
26" INCOMING
WATER SUPPLY
LINE
HOW YOUR HOT WATER DISPENSER WORKS
Water is electrically heated to near-boiling (190˚F/88˚C) in a compact tank that mounts under the sink. A thermostat maintains it at this approximate temperature.
When you turn the handle, cold water enters the tank and forces hot water out of the faucet. The system is vented so the tank is not pressurized.
Due to the unique operation of your instant Hot Water Dispenser, you may experience a slight delay in the dispensing of water after the handle is actuated.
This assures maximum water temperature and is not indicative of a problem with the unit.
Important:
Do not install this appliance in public areas or institutions where there is unsupervised access to this appliance.
SPECIFICATIONS
Capacity: 1/2 gallon (1.9L), up to 60 cups of 190˚F (88˚C) water per hour
Electrical: 750 watts, 6.5 amps, 115 volts A.C. Grounding 3-wire cord and plug provided
Thermostat: Snap-action, adjustable from 160˚F to 211˚F (71˚ to 99˚C). Factory pre-set at approximately 190˚F (88˚C)
Insulation: Meets UL 94HF-1 flammability specification
Valve: Rapid, self-closing
Shipping weight: 7 lbs. (3.2 kg.)
ELECTRICAL WIRING
H-990 dispenser shown

INSTALLATION INSTRUCTIONS
1 IF YOU WISH TO USE THE HOLE IN WHICH THE SPRAY
HOSE IS LOCATED, FOLLOW THESE EASY STEPS:
1. Turn off water supply
2. Remove nut that connects spray hose at bottom of faucet.
3. Remove nut that connects spray hose at bottom of washer flange in spray
hole using ordinary wrench or basin wrench.
4. Plug faucet tube opening with either a 1/8" plug or a 1/4" cap (not supplied)
What if you don’t use a sprayer hole?
You can cut a mounting hole through a stainless steel sink with a 1-1/4" (32mm)
chassis punch. Rent or purchase one at your hardware or electrical supply
store. Or, mount the Hot Water Dispenser’s head in a 1-1/4" (32mm) hole drilled
through your countertop with a hole saw. Don’t attempt to drill a hole through a
cast iron or porcelain covered sink unless you have the proper tools and skills.
2STRAIGHTEN DISPENSER TUBES
There are two copper tubes exiting from the dispenser head, which are curved for
easier packing and shipping. Straighten, holding the head down with one hand
while working the tubes down slowly with your other hand. See Caution, Step 9.
3INSTALL DISPENSER HEAD
H-990
1. Place dispenser assembly (without handle) thru sink hole.
2. Place toggle on bolt from bottom, then the nut and tighten by bolt head
located on top of the faucet. Note that the open area on the toggle is positioned
around the copper lines and vent lines. Note that the toggle is mounted with
the nut holder facing down.
3. Hand tighten toggle bolt until faucet cannot easily be twisted from side to
side. Torque on bolt should not exceed 30in. Lbs.
Note: Ensure toggle bolt head is seated in recess
H-770
1. Place the dispenser head with #10-24 mounting screw and gasket attached
down through the mounting hole. Then while an assistant holds the dispenser
head in place, secure the head as shown in 3-2 and 3-3.
2. Working from below the sink, place semi-circular metal mounting washer
over the mounting screw.
3. Now, simply tighten.
GN/HC
1. Remove wing nut from valve body for 1-1/4" (32mm) sink hole, stack 1-5/8"
rubber washer, 1-5/8" stainless washer or 2-1/4" colored washer. For cast iron
sink or hole greater than 1-1/4", stack 1-5/8" rubber washer with 2-1/4" stain-
less or 2-1/4" colored washer.
2. Have someone hold the head assembly from above and, while working
from under sink, slide the 2-1/4" fiber washer into place and tighten the
assembly using the plastic wing nut.(A): Shroud (B): Set screw for adjusting
head direction (C): countertop or sink 7/8" max (22mm) (D): Wing nut (E):
2-1/4" fiber washer (F): 1-5/8" rubber washer (G): 1-5/8" stainless washer
or 2-1/4" colored washer
3. Cast iron sink hole greater than 1-1/4" (32mm) (A): 2-1/4"SS or colored
washer (B): 1-5/8" rubber washer (C): Fiber Washer (D): Wing nut
If desired, the spout may be rotated 90˚ in either direction to allow the dis-
penser levers to be on the left or right side of the spout. To do this, remove
shroud which snaps onto inner cover. Using small screwdriver, loosen set screw
on left side of valve body and rotate spout in desired direction. Do not pull
spout up or out! RETIGHTEN SET SCREW AND REPLACE SHROUD.
4MAKE CONNECTION TO COLD WATER SUPPLY LINE
1. The recommended connection can be made using a shutoff valve. This is a
complex installation and should only be attempted by an experienced installer
with the proper knowledge and tools.
2. Where plumbing codes permit, a saddle valve (not supplied) can be used to
supply water to the dispenser. If the saddle valve is to be used on copper pipe
it is not necessary to pre-drill any holes. Simply follow the directions for “self-
piercing attachments” included with the valve. (Attach the valve to a cold water
supply line) Note: Saddle valves are susceptible to clogging.
Product Damage
Excessive use of paste or tape pipe sealants on water connections can
clog small water passages.
Electric Shock Hazard
Never use an electric drill to drill into water pipes. It can result in an electric
shock. Use a cordless or non-electric hand drill.
23
4
1
3 -1
4 -1 4 -2
3 -2 3 -3
3 -1 3 -2 3 -3
A
B
C
D
E
F
GA
DC
B
3 -1 3 -2 3 -3
2
MODEL H-990
MODEL H-770
MODEL GN/HC

A
BC
Release
Button
Product Damage
• Do not connect electric power until tank is filled with water (step 10).
• Failure to do so may damage heating element or trip the thermal over
load protector.
5 -1
6 -1 6 -2
7 -1 7 -2
8 -1 8 -2 8 -3
5 -2 5 -3
INSTALLATION QUESTIONS?
Call the Answerline at 1-800-558-5700
Product Damage
Do not plug unit in until tank is filled with water and water flows from spout.
AB
5CONNECT WATER TO DISPENSER HEAD – H770,
H990, GN
1. Before you start open the shutoff valve and let a small amount of water
run through it into the pan. This will flush the line of any sediment.
2. When connecting to a compression type fitting (tee or valve), remove the
nut and ferrule (a rounded brass fitting) from the valve. Then place the nut
followed by the ferrule over the end of the LONGEST copper tube coming
from the dispenser head. (A): Nut (B): 1/4" copper tube (C): Ferrule
3. Push the tube end all the way into the valve opening, or tee fitting. Hold
the tube end in position and push the ferrule down as far as it will go. Now,
tighten the nut over the ferrule with your fingers. Make sure the tube end is
going straight into the hole. Then tighten the nut firmly with a 1/2" wrench.
Do not overtighten.
CONNECT WATER TO DISPENSER HEAD – H/C ONLY
The HC dispenser has two incoming 1/4" water lines. One line (color coded
white) supplies water to the tank for 190˚F(88˚C)* hot water. The other line (no
color code) supplies water from the water supply line. The two lines may be
connected through two (2) tees to a common water supply line (see diagram A)
or if a water chiller is used, the unmarked line is connected to the chiller (see
diagram B). Shown are typical installations with tees and shut-off valve.
A. Water connection without a chiller
Connect both the white coded and the unmarked 1/4" copper line, thouth a
1/4" tee to a supply line tee. Locate shutoff valve to shut off flow to dispenser.
B. Water connection with water chiller
Connect the white coded 1/4" copper line to a supply line tee.Connect the
unmarked 1/4" copper line to the water chiller outlet. Connect chiller to supply
line tee. See chiller manufacturer’s instructions.
*Approximate
6ATTACH DISPENSER HANDLE (model H-990 only)
Place handle over top of dispenser assembly. Align hole on inside front of
handle with black peg. Use a downward and rolling movement to the back
until the handle “clicks” into place. The handle can be removed by pressing
the release button on the back of the handle and tilting the handle down
and forward.
7TEST YOUR WATER CONNECTION
1. Open the shutoff valve all the way and see if your connections are
watertight.
2. Place a pan under the unattached tubes and turn the handle on the dis-
penser. You should see water coming out of the small copper tube. Let the
water run for a few seconds to flush out the lines, then turn the faucet off.
8MOUNT TANK
1. Mount the tank on either a back or side wall. Start by holding tank up and
making sure the tubes reach it. When you have decided where you want to
mount the tank, mark the position of the top of the tank on the wall with a
pencil. Allow sufficient space under tank for drain access.
2. Position the metal mounting bracket about one inch (25mm) below the
mark on the wall and attach it through the slots with the two screws provided.
The use of (2) #8 plastic anchors (not provided) is recommended for mount-
ing screws in any material other than wood.
3. Hang the tank on the bracket. There is room to adjust the bracket, if
necessary.

Product Damage
Overtightening the plastic nut can break the inlet fitting.
Product Damage - DO NO PLUG IN YET
Do not plug unit in until tank is filled with water and water flows from spout.
Product Damage
• Make sure bends in all tubes are smooth and unkinked before you proceed.
• Make sure all tubes are not twisted, pinched or blocked.
• Do not extend the two water lines to the tank beyond the 16" (40cm) provided.
• Pinched or blocked water lines may cause access pressure and damage
the dispenser tank.
Electric Shock Hazard - This Appliance Must be Properly Grounded.
• Do not alter or remove the ground pin from the power supply cord.
• Using an ungrounded appliance can result in serious injury or death from
electric shock.
9 -1 9 -2
9 -3 9 -4
10 -1 10 -2
INSTALLATION QUESTIONS?
Call the Answerline at 1-800-558-5700
Product Damage
Do not plug unit in until tank is filled with water and water flows from spout.
10
9MAKE FINAL PLUMBING CONNECTIONS
1. Slip plastic nut over 1/4" copper inlet tube. Insert tube into threaded inlet
fitting until you feel it stop. Be sure copper tube is straight.
2. Align plastic nut and tighten by hand. Use caution to avoid cross-threading
nut. Next, use a small adjustable wrench to slowly tighten nut 1-2 turns past
finger tight until tube is snug. If tube is not snug after two full turns, remove
nut, and check that tube is fully seated. Then retighten nut NOT MORE
THAN THREE (3) FULL TURNS past finger tight.
3. Connect clear plastic vent line to smallest (center) fitting by squeezing hose
clamp with pliers, positioning clamp/hose on fitting, and releasing to secure.
4. Finally, connect 7/16" flexible outlet tube to remaining fitting by squeezing
hose clamp with pliers, positioning clamp/hose on fitting, and releasing to secure.
Note: Ensure that the flexible plastic vent and outlet tubes are not twisted,
pinched or blocked.
FILL TANK
1. Make sure shutoff valve is turned on. Then turn handle, left or right, or
up or down, and hold open.
2. After about one minute, tank will fill and water will flow from dispenser
spout. Check all water connections for leaks. If water leaks, check all fittings
and tighten if necessary.
This appliance must be grounded. In the event of a malfunction or break-
down, grounding provides a path of least resistance for electric current to
reduce risk of electric shock. This appliance is equipped with a cord having
an equipment grounding conductor and a grounding pin. The plug must be
connected to an appropriate outlet that is properly installed and grounded
in accordance with all local codes and ordinances.
•Improper connection of the equipment-grounding conductor can result in
a risk of electric shock. Check with a qualified electrician or serviceman
if your are in doubt as to whether the appliance is properly grounded.
•Do not modify the plug provided with the appliance. If it will not fit the
outlet, have a proper outlet installed by a qualified electrician.
•Once the electrical cord is plugged in, it will take 10 to 15 minutes for
the water to reach its 190˚F (88˚C) (approximate) temperature.
•During the heating cycle you can expect to hear gurgling or hissing sounds
within the tank. This is normal. The unit may boil briefly on initial start-up
until the temperature sensing system reaches equilibrium. This is also
normal. Boiling is indicated by steam or hot water spurting from the
dispenser spout without actuating the dispenser handle.
•If your dispenser is boiling, carefully activate the dispenser handle for
about 20 seconds to draw off that steaming hot water and allow the water
in the tank to reheat. Repeat this step one or two more times. Do not
allow the dispenser to continue to boil.
•If the dispenser continues to steam or boil it will be necessary to adjust
the thermostat slightly to decrease the water temperature. Refer to
temperature adjusting procedure and warnings.
High Altitudes: Because the boiling point of water is reduced at higher
elevations (e.g. Denver, Colorado) it may be necessary to decrease the
temperature setting to keep the unit from boiling. Refer to temperature
adjusting procedure and warnings.
11 PLUG IN THE UNIT

The thermostat is factory pre-set at approximately 190˚F (88˚C). If the
temperature needs to be adjusted follow the steps outlined below.
1. Unplug or disconnect the unit from the electrical supply.
2. Remove the screw securing the access cover to the unit (see Figure 1).
3. Insert a small flat blade screwdriver into the thermostat adjusting screw
(see Figure 2).
4. Turn the screw 1/2 dial marker clockwise to increase the temperature
(1/2 dial marker counterclockwise to decrease water temperature).
5. Replace access cover and screw.
6. Reconnect the electrical supply.
7. Draw three (3) cups of water and allow the unit to reheat.
8. Check the water temperature and repeat the process if necessary.
Do not allow the unit to boil.
DRAINING THE TANK
1. Unplug or disconnect the unit from the electrical supply.
2. Allow water to run from the dispenser head until cool (approximately
1/2 gallon).
3. Shut off the supply of water to the dispenser.
4. Place a drain pan or other similar container underneath the tank.
5. Remove the drain cap located on the bottom of the tank and drain
water (approximately 1/2 gallon).
6. Replace drain cap. Do not over tighten.
7. Reconnect the water supply.
8. Actuate dispenser head handle until water flows from the dispenser
head.
9. Reconnect the electrical supply.
Electric Shock Hazard
• To prevent electrical shock, disconnect power before removing access cover to adjust or service the thermostat.
Scalding Hazard
• Do not allow water to boil. May result in severe burns.
Fire / Product Hazard
• Do not remove or alter the thermal overload protector. May result in product damage or fire.
Access
cover
Figure 1
Temperature
Adjustment
Figure 2
ADJUSTING TEMPERATURE
USE
Product Damage
Remember - do not reconnect the electrical supply unless the tank is completely filled with water and water flows from the dispenser head.
Reference step 10 in these installation instructions.
SEASONAL STORAGE
Seasonal storage of the unit is recommended if the unit is to be left
unattended for long periods of time (typically more than two weeks)
particularly if the unit could be exposed to freezing temperatures.
1. Unplug or disconnect the unit from the electrical supply.
2. Allow water to run from the dispenser head until cool (approximately
1/2 gallon).
3. Shut off the supply of water to the dispenser.
4. Place a drain pan or other similar container underneath the sink.
5. Remove the drain cap located on the bottom of the tank and drain
water (approximately 1/2 gallon).
6. Replace drain cap. Do not over tighten.
CLEANING
Use only a soft cloth and warm soapy water to clean the dispenser head and tank. The use of harsh cleaning agents containing acids, alkalines and
organic solvents can destroy the dispenser head and tank finishes.

TROUBLESHOOTING GUIDE
INSTALLATION QUESTIONS?
Call the Answerline at 1-800-558-5700
Problem
Water is not hot
Water too hot or not hot
enough
Water dripping from the
spout or vent:
• When heating
• Constantly
Water comes out the vent
instead of the spout.
Water and steam spits
forcefully from spout without
turning on the dispenser
faucet.
Water taste or odor.
Water does not flow imme-
diately after the actuating
handle.
Possible Cause
Unit not plugged in or electric out-
let is inoperative.
Thermal overload protector has
tripped
Thermostat not adjusted to your
taste
Low water pressure preventing the
expansion chamber from draining
properly
Construction debris from water line
obstructing the faucet valve seat
causing a slow water leak.
Outlet tube is blocked
Flow straightener is blocked
Unit is boiling
Normal start-up
Chlorine or contaminants in the
incoming water supply may be
more noticeable in hot water
Normal functioning
of the unit
What to do
Check that the unit is connected to a properly grounded electric outlet and that
circuit breakers or fuses are in good order.
Contact your In-Sink-Erator dealer for service.
Adjust thermostat. See Adjusting Temperature.
Unplug the unit. If the dripping stops within a few minutes, your water pressure
may not be sufficient to properly drain the expansion chamber.
Check that there are no obstructions in the water line reducing the supply
pressure below 20 pounds per square inch. For example: a poorly mounted
saddle valve, a clogged water filter (not supplied), or a partially opened shut-off
valve (not supplied).
Contact your In-Sink-Erator dealer for service.
Check that the outlet tube is not kinked, twisted or pinched.Remove flow
straightener from end of spout by twisting counterclockwise. Remove any debris
or scale accumulation. Soak in a mild vinegar solution if necessary to loosen
scale deposits. Reinstall flow straightener by threading it on clockwise.
Reduce water temperature. See Adjusting Temperature.
Under some water conditions your unit may need a few days to “season”. Open
the dispenser faucet and run until the water is cold. Allow the unit to reheat. Repeat
several times per day over 3-4 days to season the unit.
Provide a suitable drinking water filter.
Contract your local water authority for suggestions.

Property Damage
• Do not plug unit in until tank is filled with water and water flows from spout.
• To avoid water damage due to leakage, replace any cut, loose or split plastic tubing.
Important:
Do not install this appliance in public areas or institutions where there is
unsupervised access to this appliance.
IN-HOME SERVICE WARRANTY
WARRANTY DURATION: In-Sink-Erator provides a full one (1) year warranty from the date of manufacture or the date of purchase with supporting receipt.
If the unit is professionally installed, the warranty is one (1) year from the date of installation with supporting receipt.
WARRANTY COVERAGE: The In-Sink-Erator In-Home-Service warranty provides replacement parts and labor to correct defects in material or workmanship
in the dispenser. If warranty service is required, contact the nearest authorized In-Sink-Erator Service Center. Service Center personnel will repair or replace
the unit in your home at no cost to you.
This warranty gives you specific legal rights and you may have other rights, which vary from state to state. If the manufacturer determines that the unit should
be replaced rather than repaired, the warranty on the replacement unit will be limited to the unexpired term of the original warranty. No other express warranty,
written or oral, applies.
Before initiating warranty service, please consult these installation instructions to ensure the unit is properly installed and the troubleshooting guide. If the
unit still does not function properly, contact the In-Sink-Erator Answerline at 1-800-558-5700 or write to In-Sink-Erator Service Department • 4700 21st Street •
Racine, Wisconsin 53406 USA.
When writing or calling, give the following information: date, your name, address and phone number. Describe the product by model number, serial number,
date purchased, place purchased, service history (include name and address of service agent) and clearly describe the problem and service required.
Note: The foregoing warranty does not apply to damage or inoperation resulting from accident, alteration, misuse, abuse, improper installation, installation not
in accordance with these instructions or local electrical and/or plumbing codes or to product which shows evidence of having been started up “dry”. We do not
assume any responsibility for consequential damage.