WT-805 Digital Programmable WATER HEATER THERMOSTAT For GAS and ELECTRIC TANK

Description

Digital programmable water heater thermostat for gas and electric tank.
Water Heating cost is a major part of the households as well as commercial heating bills. WT-805 is a programmable controller that allows the users to
preprogram a specific daily time schedule and the water temperature for the hot water needed throughout the hours of 5 days of the week and the weekend
separately. This eliminates the waste of energy and dramatically lowers the cost of water heating.
This thermostat can be used for Gas Water Tanks as well as Electric Water Tanks.
This microprocessor based controller consists of two units:
The Control Panel with large size, backlit LCD screen and the Power Module to control the water heating power and timing.
For both, the Electric and the Gas water tank systems the Control Panel and its installation is the same.
The Power Module installation and components however differ between the gas or electric heating
Components required for use with Electric Water Tank:
1. WT-805CP Programmable Thermostat Control Panel
2. WT-805PM Power Module
Components required for use with Gas Water Tank:
1. WT-805CP Programmable Thermostat Control Panel
2. WT-805PM Power Module
3* Compatible Temperature Probe ( sensor )
4** Compatible Gas Ignition Controller
5** Compatible Electric Gas Valve
6** Compatible Gas Igniter
NOTE: Items marked with “ * “ may be supplied by others and should be
chosen to be compatible with the water tank heating system for installation.
* The Temperature Probe may be either separate or integrated with the
Gas Valve assembly as long as the probe connector wiring is compatible
with the connector header on the WT-805 Power Module and the required
electrical and thermal specifications. For details see the description of the
probe and its connector pin-out.
** The Ignition Controller, Gas Valve assembly and the Igniter assembly
should be compatible functionally and electrically with each other for the
desired functionality and wiring. The WT-805 Thermostat Power Module
will only control the supply power to the Ignition Controller.
SPECIFICATIONS:
Supply: Selectable by model: 120VAC, 208-240VAC, 12VAC, 24VAC,
50/60Hz
AUTO Programs: Weekly 5/2 day programs with 4 programs per day and 1 SMode
special program for any period during the week.
MANUAL Modes: 1 Normal MANUAL mode and 1 Special MANUAL S-Mode.
Program Memory: Nonvolatile. The programs will be retained even without power
or without batteries.
Clock: 12 and 24 hour format selectable via keypad.
Temperature test range: +4°C to +143°C (40°F to +290°F)
Program setting range: +40°F to +160°F (+4°C to +70°C) for Normal Modes and +40°F
to +120°F (+4°C to +50°C) for Special S-Modes.
Temperature sensor: Standard: Compatible with 10 kohm NTC Thermistor
temperature probes. Curve factor B=3950 .
Optional: Compatible with 100 kohm NTC Thermistor
temperature probes. Curve factor B=4100 .
High Temp. protection: Compatible with internal high temperature protection fuse in the
probe assembly, normally closed.
Storage temperature: -20°C to +70°C (-4F to +158°F)
Clock Battery backup: 3 "AAA" size batteries, 1.5V each.
Control Output: For Gas Tank models: 2Amp, 250VAC max. with internal 2
Amp fuse.
For Electric Tank models: 30Amp, 250VAC max. with external
fuse.