TECH ST-37 Assembly instructions

ST-37 Instruction Manual
TECH
Declaration of Conformity No. 4/2004
Hereby we declare under sole responsibility that the ST-37
230V 50Hz thermoregulator manufactured by TECH ul. St.
Batorego 14 34-120 Andrychów is compliant with the
Regulation by the Ministry of Economy. (Journal of Laws Dz.
U.03.49.414) of 12 March 2003 implementing provisions of
the Low Voltage Directive (LVD) 2006/95/EC and the
Regulation by the Ministry of Infrastructure (Journal of Laws
Dz.U.03.90.848) of 2 April 2003 implementing provisions of
the Directive 2004/108/EC.
The ST-37 controller has been tested for electromagnetic
compatibility (EMC) with optimal loads applied.
For compliance assessment harmonized standards were used:
PN-EN 60730-2-1:2002.
The product was CE-marked for the first time on: 1 December
2004
Co-owners:
Paweł Jura Janusz Master
Andrychów 1 December 2004
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TECH
ATTENTION!
ELECT IC CU ENT!
Make sure the regulator is unplugged before
working on the power supply (cable
connections device installation etc.)!
All mounting works must only be carried out
by qualified electricians.
Before activating the controller measure the
electric motor resetting efficiency check the
boiler and inspect wire insulation.
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ST-37 Instruction Manual
I. Description
The ST-37 temperature regulator is used for controlling the water circulation
pump hot consumption water pump blow (fan) and fuel feeder.
If the furnace temperature is lower than the setpoint temperature the
regulator is operated in its duty cycle i.e. the blow is active and the
operation time of the fuel feeder is set by the user (both operation and
stand-by time is set).
If the furnace temperature is equal to or higher than the setpoint
temperature the regulator is operated in its sustain cycle.
In each case the software version is customized to the furnace
manufacturer’s requirements. Please send all comments on the software to
the boiler manufacturer.
Your controller should be set according to your individual needs depending on
the type of fuel and boiler used. TECH shall not be held responsible for
incorrect settings.
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Return from
menu resetting
Enter submenu
confirm
Plus Minus
Hot
Consumption
Water Pump
Central
Heating
Pump
Blow
Feeder
Alarm

TECH
II. Regulator Functionality
This chapter describes regulator functionality how to change settings and
navigate in the menu.
II.a) Main Page
During normal operation the LCD display shows the main page with the
following data:
Boiler temperature
Setpoint temperature
With the display you can instantly change the setpoint temperature with
PLUS and MINUS. Pressing OPTIONS will move you to the first level. The
display shows the first two lines of the menu. To navigate in each menu use
PLUS and MINUS. Pressing OPTIONS will move you to the next submenu or
will enable an option. Pressing EXIT will move you to the home menu. When
the main page is displayed pressing (and holding) EXIT will inform you
whether the hot consumption water pump is on or off.
II.b) Manual Mode
For your convenience the regulator has a manual mode module. In this
mode each individual element is enabled and disabled independently of the
other.
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22oc 56oc
C.H. ON
22oc 56oc
C.H. ON
Feeder
BLOW
Manual Mode
Feed Time

ST-37 – Instruction Manual
Pressing OPTIONS will enable the fuel feeder. The feeder will operate until
OPTIONS is pressed again.
Press OPTIONS to enable / disable the blow.
Press OPTIONS to enable / disable the central heating pump.
Press OPTIONS to enable / disable the (water heater) hot consumption water
pump.
Press OPTIONS to enable / disable the alarm.
II.c) Feed Time
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BLOW
C.H. Pump
00 min 20 sec
Feed Time
C.H. Pump
H.C.W. Pump
22oc 56oc
C.H. ON
Manual Mode
Feed Time
H.C.W. Pump
Alarm
Feeder
BLOW
F D R
BLOW

TECH
With this function you can set the operation time for the fuel feeder. Set the
operation time according to the type of fuel and boiler used.
II.d) Feed Interval
With this function you can set the stand-by time for the feeder depending on
the type of fuel used in the boiler. Incorrect operation and stand-by times
may cause the boiler to malfunction i.e. inability to burn all carbon and to
reach the setpoint temperature. Setting correct times will ensure correct
boiler operation.
II.e) Fan Operation in Sustain Mode
With this function you can set the blow time in the sustain mode.
II.f) Fan Interval in Sustain Mode
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22oc 56oc
C.H. ON
Feed Time
Feed Interval
00 min 40 sec
Feed Interval
22oc 56oc
C.H. ON
Feed Interval
Fan Sustain Duty
00 min 10 sec
Fan Sustain Duty
22oc 56oc
C.H. ON
Fan Sustain Duty
Fan Sustain Pause
30 min 00 sec
Fan Sustain Pause

ST-37 – Instruction Manual
With this function you can set the blow interval in the sustain mode.
The two menus are used for regulating the furnace while in the sustain
mode. This is to prevent damping of the furnace when the boiler temperature
is over the setpoint value.
ATTENTION: Incorrect settings may cause a continuous increase of the
temperature! In particular interval in the sustain mode should not be too
short and operation in the sustain mode should not be too long.
II.g) Feeder
With this function you can disable or enable the fuel feeder depending on its
condition (e.g. in order to damp the boiler).
II.h) Blow
With this function you can disable or enable the blow depending on its
condition (e.g. in order to damp the boiler).
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22oc 56oc
C.H. ON
Fan Sustain Pause
Feeder
On *
Off
22oc 56oc
C.H. ON
Feeder
Blow
On *
Off

TECH
II.i) Pump Switch on Temperature
With this function you can set the temperature that will activate the central
heating pump and the hot consumption water pump (the temperature is
measured on the boiler). Below the setpoint temperature the pumps are
disabled; above the setpoint temperature the pumps are enabled but their
operation is based on the settings i.e. the pumps are enabled alternately (see
the pump priority function or fixed central heating pump)
II.j) Central Heating Hysteresis
With this function you can set the hysteresis of the setpoint temperature.
This is a difference between the temperature of entering into the sustain
cycle and the temperature of returning to the duty cycle (e.g.: when the
setpoint temperature is set to 60°C and the hysteresis is set to 3°C entering
into the sustain cycle will be effected after the temperature reaches 60°C
whereas return to the duty cycle will be effected after the temperature drops
to 57°C).
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22oc 56oc
C.H. ON
Blow
Pump Activ Temp
35 oc
Pump Activ Temp
Pump Activ Temp
C.H. Hysteresis
22oc 56oc
C.H. ON
2 oc
C.H. Hysteresis

ST-37 – Instruction Manual
II.k) Hot Consumption Water Hysteresis
With this function you can set the hysteresis of the setpoint temperature on
the water heater. This is a difference between the setpoint temperature
(required by the water heater) and the actual temperature on the boiler (e.g.:
when the setpoint temperature is set to 55oC and the hysteresis is set to 5oC.
After reaching the setpoint temperature i.e. 55°C the hot consumption water
pump is activated causing the central heating pump to be activated. The hot
consumption water pump will be activated again when the temperature drops
to 50°C).
II.l) Blow Force
With this function you can control the fan speed. The adjustment range is 1-
10 (referred to as gears). The higher the gear the higher the speed with the
1st gear being the minimum and the 10th being the maximum speed of the
fan.
Fan speed can be adjusted with PLUS and MINUS. Initially the fan runs
always at full speed so that it is possible to start the fan with the motor being
slightly dusty.
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22oc 56oc
C.H. ON
H.C.W. Hysteresis
Blow Force
Gear 10
Blow Force
22oc 56oc
C.H. ON
5 oc
H.C.W. Hysteresis
C.H. Hysteresis
H.C.W. Hysteresis