KING HT User Manual

GENERAL INFORMATION

HT SERIES

Hydronic Toe Space Heaters

Under Cabinet Heaters

DANGER

ELECTRIC SHOCK OR FIRE HAZARD

READ ALL WIRE SIZING, VOLTAGE REQUIREMENTS AND SAFETY
DATA TO AVOID PROPERTY DAMAGE AND PERSONAL INJURY

SAVE THESE INSTRUCTIONS

tested to: 1995 standards

WARNING

READ CAREFULLY - These instructions were written to help prevent diffi culties that might arise during installation of this
heater. Studying the instructions fi rst may save you considerable time and money later. Observing the following procedures
will cut the installation time to a minimum. King encourages you to save these instructions for future reference.

Thank you for buying this King HT series heater. It should provide years of trouble-free service and comfort to your home.
Please inspect the package to ensure the heater coil and fan, with grill and screws are included.

Here are a few tips in getting the heater installed correctly!

1. LOCATION: This heater is intended to be installed under a kitchen or bathroom cabinet in the toe space area although other locations are
possible.

2. BATHROOMS: Under the vanity is an ideal location for the HT Series. Placement should be off to one side or the other from where people
will be standing at the sink as the heat discharged could cause discomfort or minor burns to skin if exposed for long periods of time.

3. KITCHENS: This heater is conveniently sized for placement under the kitchen sink cabinet. Placement should be off to one side or the other
from where people will be standing at the sink, as the heat discharged could cause discomfort or minor burns to skin if exposed for long periods
of time.

4. LIVING ROOMS: In the step or a deep wall is a good location for the HT Series. This style of heater has a higher sound rating than the
standard H Series at high speed.

5. MOUNTING:
New construction: Place this heater on the fl oor where the cabinet will be over the top. Add underlayment under heater if that will be used on
the fl oor in front of the cabinet. Take cover off and mount to the fl oor through the holes provided on the bottom side. Use only the screws holes
in the front outlet by the grille so that you can remove them if you need to adjust the wall can forward or backward to match up with the toe
board for the grille.

Remodel or cabinets in place: Cut the toe kick area the proper width to install in toe board.

KING ELECTRICAL MFG. COMPANY · 9131 10TH AVENUE SOUTH · SEATTLE, WA 98108 · PH: 206.762.0400 · FAX: [phone] · www.king-electric.com

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INSTALLATION INSTRUCTIONS

Following are installation guidelines:

• Disconnect power at main panel.

• Make certain all wiring and plumbing is in accordance with all local codes.

• Ensure units are properly grounded.

• Heater voltage rating should be the same as supply load.

1. To Install: Take off cover of heater by removing screws on sides of unit. Locate the two front mounting slots and install screws into them. Do not completely secure
it or screw it down solid until you fi nd out where the toe kick panel is going to be. These slots will give you the adjustment if needed to match up with the kick board
surface after the cabinet is installed.

2. Plumbing: Feed hot water lines to back of the heater providing enough PEX hose to service and remove interior in the future. Copper coils are manufactured to be
used with potable water and pressures up to 125 psi. Coils have been checked at 300 psi at factory. Pressure test coils and system at this time before cabinets are
in place.

3. Electrical: Wiring will be routed through the knockout on the side of the wall can. Provide a strain relief and comply with all local and national codes for plumbing
and electrical work performed. Attach the wire leads to the power supply with approved wire nuts and attach groundwire to the wall can ground. A maximum of 15
Amp circuit can be run to the heater. Do not exceed 15 Amps for circuit protection. Test fan for proper operation before cabinets are installed.

4. Motor Speed: Select motor speed at this time. From the factory it will be wired to low speed. For higher output you can select high speed by relocation of the
white wire on the terminal board from SL (Speed Low) to SH (Speed High). This will increase the air output of the motor.

5. Thermostat Location: One thermostat per zone should be used. Another zone is determined by a door or doorway and another thermostat should be used for
that area. Do not put two thermostats in one zone.

6. Thermostats: For best performance and comfort a King hydronic 2 step thermostat should be used. This thermostat turns the pump on to preheat the coils, then
a minute later turns the fan on to blow heat into the room. Models available are: HW, HWP, HWPT (120 Volt line powered) or HB, HBP (battery operated). These
thermostats where specifi cally designed for use with the King hydronic fan-forced system. Do not use electric heating thermostats! They will not control close
enough to keep a comfortable temperature. One HWPT120 should be used per household system if used on a potable water system. This thermostat has a timer
that will circulate water in the system for 15 minutes every 24 hours to keep the system clear and comply with local codes.

7. Grille: Cut toe space of cabinet to fi t over the heater. After the cabinets have been placed adjust the heater can to meet fl ush with the surface of the cabinets
toe space by loosening the screws in the front of the can. Apply grille to the wall can.

8. Run heater: Pump water through the heater at full force to purge all air out of heaters in system. Turn up thermostats to verify fan and pump is operational.

9. Coil Construction: The Copper tube used in the Copper coils is Alloy 122 made to ASTM B-75 specifi cations.

WATER TEMPERATURE AND AIR FLOW RATES

FT. OF

UPC

#093319

21120

21122

21126

MODEL

HT412 2/3-AS/FS-GW

HT612 4/5-AS/FS-GW

HT812 5/7-AS/FS-GW

WATER

PRESSURE

DROP @ 2

GPM

.36 .54 2000 83 High Speed 1,700 2,500 3,400 4,600 5,200

.36 .51 1800 76 Low Speed 1,600 2,400 3,200 4,000 5,000

.54 .54 2000 83 High Speed 2,800 4,000 5,100 6,900 8,200

.54 .51 1800 76 Low Speed 2,400 3,250 4,350 6,000 6,500

.72 .54 2000 83 High Speed 3,675 5,000 6,600 7,500 9,950

.72 .51 1800 76 Low Speed 3,200 4,300 5,400 7,000 8,400

AMPS RPM CFM BTUH@2GPM 120° 140° 160° 180° 200°

Electrical Circuit Sizing

Maximum 15 Amps
circuit breaker or fusing

The heater should not be covered or blocked in any manner.

CAUTION

KING ELECTRICAL MFG. COMPANY · 9131 10TH AVENUE SOUTH · SEATTLE, WA 98108 · PH: 206.762.0400 · FAX: [phone] · www.king-electric.com

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