TECH ST-85 User manual

ST-85 – USER'S MANUAL
TECH
Declaration of Conformity No. 35/2010
Hereby, we declare under sole responsibility t at t e ST-85
230V 50Hz t ermoregulator manufactured by TECH, ul. St.
Batorego 14, 34-120 Andryc ów, is compliant wit t e
Regulation by t e Ministry of Economy. (Journal of Laws
Dz.U. 155 Item 1089) of July 21, 2007 implementing
provisions of t e Low Voltage Directive (LVD) 2006/95/EC
of January 16, 2007.
T e ST-85 controller as been tested for
electromagnetic compatibility (EMC) wit optimal loads
applied.
For compliance assessment, armonized standards were
used:
PN-EN 60730-2-9:2006.
Co-owners:
Paweł Jura Janusz Master
- 2 -

ST- 85 – USER'S MANUAL
ATTENTION!
HIGH VOLTAGE!
Make sure t e regulator is disconnected from
t e mains before working on t e power
supply (cable connections, device
installation, etc.)!
All connection works must only be carried out
by qualified electricians.
Before activating t e controller, measure t e
motor resetting efficiency, c eck t e boiler
and inspect wire insulation.
- 3 -

Blow

ST- 85 – USER'S MANUAL
I. Description
T e ST–85 temperature regulator is intended for use wit central eating
boilers. T e regulator is used for controlling t e central eating water
circulation pump, ot consumption water pump and blow (fan).
T e ST-85 is a PID-basedcontroller using a continuous signal. In t is
type of controllers, t e fan power is calculated based on boiler temperature
and flue gas temperature measured at t e boiler outlet. T e fan runs
continuously and its power depends directly on t e measured boiler
temperature and flue gas temperature as well as t e difference between t e
two parameters and t eir setpoint values. Advantages of zPID regulators
include t eir ability to maintain a stable setpoint temperature wit out
unnecessary overregulations and oscillations.
By fitting t e controller wit a flue gas outlet sensor, you can save
from a few up to several percent of fuel, and ensure a steady water
temperature for a longer service life of your eat exc anger (boiler). Flue gas
outlet temperature monitoring ensures reduced armful dust and gas
- 5 -
C.H. Pump
H.C.W. Pump
Manual Mode
Encoder knob
Blow
Exit
Standby

ST-85 – USER'S MANUAL
emissions. T e t ermal energy from t e flue gases is used for eating instead
of being wasted and disposed of t roug t e funnel.
Researc results presented below were obtained using t e Tech PID-based
controller:
and t e controller wit out PID control:
You can c ange all parameters wit an encoder knob. Turning t e knob
allows you to select a function or modify its value, w ile pressing t e knob
allows you to enter t e function or confirm c anged values. To leave any
function, pus t e EXIT button.
- 6 -

ST- 85 – USER'S MANUAL
I.a) Basic Terms
Fire up. T e cycle begins w en you activate t e fire up function in t e
controller's menu and is active until t e central eating boiler temperature
reac es 40oC (t e default fire-up threshold), on condition t at t e
temperature does not drop below t is value for 2 minutes (t e default fire-up
time). If t ese conditions are met, t e regulator will switc to t e duty mode
and t e manual operation symbol on t e ousing will be deactivated. If t e
controller fails to reac parameters required for entering into t e duty
mode wit in 30 minutes from activation of t e fire-up function, t e "Unable
to fire up" message will appear on t e display. In suc a case, t e fire-up
cycle needs to be restarted.
Duty – once t e fire-up cycle is finis ed, t e controller enters t e duty cycle.
T e duty cycle is t e basic functionality of t e regulator. T e blow is
controlled automatically using t e zPID algorit m and t e temperature is
close to its setpoint value. In t e user menu, fan item will appear in place of
t e fire-up function. T e fan can be deactivated w en needed (e.g. w ile
feeding fuel). If t e temperature rises unexpectedly by more t an 5oC over
t e setpoint value, t e so-called Supervision Mode is activated.
Supervision Mode – t e mode is activated during t e Duty Cycle if t e
temperature rises by more t an 5oC over t e setpoint value. In suc case,
t e controller is switc ed from t e PID control to manual settings (according
to parameters entered in t e Fitter’s Menu) to reduce t e temperature of t e
circulation water.
Damping – if boiler temperature drops by 2oC below t e fire-up threshold
and fails to rise above t is value for 30 minutes (default damping time), t e
regulator will switc to t edamping mode. W ile in t is mode, t e fan is
deactivated and t e display s ows "Damping".
- 7 -

ST-85 – USER'S MANUAL
In case of voltage loss, t e regulator ceases to operate. W en power is
restored, t e controller returns to operation wit previously set parameters
using its built-in memory. Lack of voltage does not cause t e stored
parameters to be lost.
II. Regulator unctionality
T is c apter describes regulator functionality, ow to c ange settings and
navigate in t e menu wit t e encoder (knob). Depending on t e mode t e
boiler is currently in, t e display will s ow boiler operational parameters. T e
given mode is selected by t e user.
II.a) Main Page
During normal operation, t e LCD display s ows t e Main Page containing
t e following:
●Boiler temperature (to the left of the display .
●Setpoint temperature (to the right of the display .
●Fan stop. After manually stopping t e fan w ile in t e duty mode, t e star
symbol ( ) will appear in t e down rig t corner.
●Operation Mode. In t e up rig t corner, t e corresponding letter of t e
operation mode is displayed. Depending on t e operation mode, t e
corresponding symbol is displayed:
– house heating, – water heater priority,
– parallel pumps, – summer mode.
Pressing t e encoder will move you to t e main menu. T e display
s ows two options of t e menu. To select a different option, turn t e encoder
knob.
- 8 -
42 Oc | 55 Oc *
C.H. Setpoint
C.H. Setpoint

ST- 85 – USER'S MANUAL
II.b) Changing the central heating and hot consumption
water setpoint temperature.
In order to c ange t e setpoint temperature of t e central eating
(w ile in "C.H. screen" main view), turn t e encoder knob and (after setting
a desired value) press it to confirm t e c ange.
In order to c ange t e setpoint temperature of t e ot consumption
water (w ile in "H.C.W. screen" main view), turn t e encoder knob and (after
setting a desired value) press it to confirm t e c ange.
C apter "Screen" describes methods of changing the main screen view.
II.c) Firing up
T is function allows you to easily fire up t e boiler. After igniting t e
boiler, you need to activate an automatic fire-up cycle. By selecting optimum
parameters, t e boiler uses t e zPID function to smoot ly switc to t e duty
mode. If t e boiler reac es t e fire-up threshold temperature, the fan item
will appear instead of t e fire-up function. From now on, t e option will be
used to activate/deactivate t e fan. T is setting allows you to temporarily
deactivate t e fan at any time, e.g. w ile feeding fuel.
If during t e fire-up cycle t e boiler does not reac 40OC within 30
minutes (default parameters), t e following warning message will appear
on t e display:
To restore t e boiler to operation, switc off the alarm by pressing t e
encoder and restarting t e fire-up procedure.
- 9 -
38 Oc | 55 Oc
unable to fire up

ST-85 – USER'S MANUAL
II.d) Manual Mode
For your convenience, t e regulator features a manual mode module. In
t is mode, eac individual actuator is enabled and disabled independently of
t e ot er. In addition to t e Manual Mode function, t e Blow Force
function as been provided.
T is function allows you to set t e blow force of t e fan w ile in t e
Manual Mode.
Pressing t e ENCODER activates t e fan. T e fan will operate until t e
ENCODER is pressed again.
Press t e ENCODER to enable / disable t e central eating pump.
Press t e ENCODER to enable / disable t e (water eater) ot
consumption water pump.
Press t e ENCODER to enable / disable t e alarm.
- 10 -
C.H. Pump
H.C.W. Pump
Fan
C.H. Pump
H.C.W. Pump
Alarm
low Force
Fan
20%
low Force
low Force
Fan
42 Oc | 55 Oc
C.H. Setpoint *

ST- 85 – USER'S MANUAL
II.e) Fuel Type
T is option allows you to select one of t ree fuel types (coal, fines and
wood) for use in t e boiler. Eac fuel type as a fan operation mode assigned
to ensure t e rig t burning process.
II.f) Central Heating Pump ctivation
Wit t is function, you can set t e temperature t at will activate t e
central eating pump (t e temperature is measured on t e boiler). T e
pump will start if t e setpoint temperature is exceeded. T e pump will be
deactivated w en t e boiler temperature drops below t e activation
temperature (minus ysteresis, e.g. 2OC). In t is case, t e pump will stop at
boiler temperature of 33OC.
II.g) H.C.W. Pump ctivation
Wit t is function, you can set t e temperature t at will activate t e ot
consumption water pump (t e temperature is measured on t e boiler).
Above t e setpoint temperature (e.g. 40OC), t e pump is activated and
operates depending on t e selected operation mode. T e pump will be
deactivated w en t e boiler temperature drops below t e activation
temperature (minus ysteresis, e.g. 3OC). In t is case, t e pump will stop at
boiler temperature of 37OC.
- 11 -
Fuel Type
C.H. Pump Activation
35oc
C.H. Pump Activation
C.H. Pump Activation
H.C.W. Pump Activation
40oc
H.C.W. Pump Activation
Manual Mode
Fuel Type
Coal
Fines
42 Oc | 55 O
c
c
C.H. Setpoint
42 Oc | 55 O
c
C.H. Setpoint
42 Oc | 55 Oc
C.H. Setpoint

ST-85 – USER'S MANUAL
II.h) Operation Mode
Wit t is function, you can select one out of four operation modes.
II.h.1) House Heating
If you select t is option, t e regulator will switc to t e ouse eating
mode. T e central eating pump starts to run above t e pump activation
temperature (set to 35OC by default). Below t is temperature (minus central
eating ysteresis), t e pump is s ut off. W ile in t e house heating mode,
t e icon is displayed in t e up rig t corner of t e main screen.
II.h.2) H.C.W. Priority
Activating t e ot consumption water priority will cause t e regulator to
switc into t e water eater priority mode. In t is mode, t e ( ot
consumption water) eater pump is activated until t e set H.C.W.
temperature is reac ed. T en, t e H.C.W. pump is s ut off and t e C.H.
pump is activated. T e central eating pump will run until t e water eater
temperature drops below t e setpoint value (and t e H.C.W. ysteresis);
t en, t e C.H. pump is s ut off and t e H.C.W. pump is activated.
In t is mode, t e fan is operated as long as t e temperature is below 62°C
to prevent t e boiler from over eating.
T e ot consumption water priority function consists in t at t e
consumption water is eated up before eating up water in radiators.
- 12 -
H.C.W. Pump Activation
Operation Mode
House Heating *
H.C.W. Priority
House Heating
H.C.W. Priority *
42 Oc | 55 O
c
c
C.H. Setpoint

ST- 85 – USER'S MANUAL
W ile in t e H.C.W. Priority mode, t e icon is displayed in t e up rig t
corner of t e main screen.
ATTENTION: T e boiler s ould ave non-return valves mounted on t e
central eating pump circuit and t e ot consumption water pump circuit. A
valve mounted on t e ot consumption water pump will prevent ot
consumption water from being drawn from t e water eater.
II.h.3) Parallel Pumps
In t is mode, t e pumps start to run in parallel above t e pump activation
temperature (set by default to 35OC). T ese temperatures may, owever,
vary depending on user settings. T is will cause irregular activation of t e
pumps. However, w en bot t res olds are exceeded, t e pumps will
operate simultaneously. T e central eating pump runs continuously, w ile
t e ot consumption water pump stops after t e setpoint temperature is
reac ed in t e water eater.
W ile in t e Parallel Pumps mode, t e icon is displayed in t e up rig t
corner of t e main screen.
ATTENTION: In t is mode, a non-return valve s ould be fitted to
maintain different temperatures in t e water eater and in t e ouse. After
activation of t e parallel pumps function, t ree items appear on t e display.
Starting from t e left, t ese are: Boiler Temperature (C.H.); Water Heater
Temperature (H.C.W.) and Setpoint Temperature (C.H.).
II.h.4) Summer Mode
W en t e function is enabled, only t e ot consumption water pump is
- 13 -
H.C.W. Priority
Parallel Pumps *
Parallel Pumps
Summer Mode *
42 Oc | 55 O
c
c
C.H. Setpoint
45 Oc 43 Oc 55 O
c
c
C.H. H.C.W. Set

ST-85 – USER'S MANUAL
running in order to eat water in t e water eater. T e pump is switc ed on
above a predefined activation t res old (see t e pump activation
temperature function) and will run until t e setpoint temperature as been
reac ed. T e pump will start again w en t e temperature drops below t e set
ysteresis. In t e Summer Mode, only t e setpoint temperature is set on t e
boiler t at eats up water for t e water eater (t e temperature set for t e
boiler is also t e temperature set for t e water eater).
W ile in t e Summer Mode, t e icon is displayed in t e up rig t corner
of t e main screen.
II.i) Main Screen
T is function allows you to c ange t e view of t e main screen. T e
following views are available:
➢C.H. SCREEN
T is screen displays t e current and setpoint C.H. temperatures. By
turning t e knob, you can c ange t e setpoint temperature. After setting t e
appropriate value, confirm it by pressing t e encoder knob.
➢H.C.W. SCREEN
T is screen displays t e current and setpoint H.C.W. temperatures. By
turning t e knob, you can c ange t e setpoint H.C.W. temperature. After
- 14 -
OPERATION MODE
MAIN SCREEN
• C.H. SCREEN
H.C.W. SCREEN
C.H. SCREEN
• H.C.W. SCREEN
44 Oc | 55 O
c
c
C.H. Setpoint
43 Oc | 50 O
c
c
H.C.W. Setpoint

ST- 85 – USER'S MANUAL
setting t e appropriate value, confirm it by pressing t e encoder knob.
➢FLUE GASES SCREEN
T e following items are displayed, starting from t e left: current C.H.
temperature, current flue gases temperature and blow power in percentages.
T is view is used for monitoring current boiler parameters.
II.j) Language
Wit t is function, you can select t e language of your controller.
II.k) Factory Settings
T e regulator as been pre-configured. However, it s ould be adjusted to
your individual needs. It is possible to return to t e factory settings at any
time. By enabling t e Factory Settings, all existing boiler settings will be
replaced by settings made by t e manufacturer. From t en on, you can again
set your own operating parameters for t e boiler.
II.l) Fitting parameters
Access to fitting parameters is disabled for t e user. T is special view
contains advanced parameters accessible only by t e manufacturer.
- 15 -
Fixed C.H. Pump
Factory Settings
Yes
No
23 Oc | 55 Oc
Setpoint
H.C.W. SCREEN
• FLUE GASES SCREEN
45 Oc 93 O
c 80%
c 80%
C.H. FLUE FAN
MAIN SCREEN
LANGUAGE

ST-85 – USER'S MANUAL
III. Protections
In order to ensure a safe and faultless operation, t e regulator as been
provided wit numerous protections. In t e case of an alarm, an acoustic
warning is sounded and t e display s ows a corresponding message.
Press t e encoder to restore t e controller to operation. In t e case of t e
C. . Temperature Too igh alarm, wait until t e temperature drops below
t e alarm value.
III.a) Thermal protection
T e boiler is protected wit an additional bimetal sensor (located at t e
boiler temperature sensor) t at disables t e fan w en t e temperature
exceeds t e critical value: 85OC. T is is to prevent water from boiling in t e
system w en t e boiler as been over eated or t e controller is damaged.
W en t e protective function is enabled and t e temperature drops to a safe
value, t e sensor will automatically restart t e device and t e alarm will be
deactivated. If t e sensor is damaged or over eated, t e burner, fan and
feeder are disabled.
III.b) utomatic Sensor Check
W en t e temperature sensor of t e central eating or ot consumption
water is damaged, an alarm is sounded wit an additional indication s own in
t e display, e.g.: „C. . Sensor Damaged".
Blow is disabled and bot pumps are activated simultaneously, regardless of
t e temperature.
If t e central eating sensor is damaged, t e alarm will remain active until
t e sensor is replaced. If t e ot consumption water sensor is damaged,
pressMENU to deactivate t e alarm and restore t e single ( ouse eating)
- 16 -
Alarm
C.H. Sensor Damaged

ST- 85 – USER'S MANUAL
pump mode. To be able to operate t e boiler in all modes, it is necessary to
replace t e sensor.
III.c) Temperature Protection
T e regulator features an additional protection in case t e bimetal sensor
is damaged. After t e temperature exceeds 85OC, t e alarm is sounded wit
t e display s owing t e following message:
T e current temperature is read from an electronic sensor and
processed by t e t ermoregulator. W en t e alarm temperature is exceeded,
t e fan is s ut off and bot pumps begin to run in order to distribute ot
consumption water t roug out t e system.
III.d) nti-Boil Protection
T is protective function is used only wit t e water heater priority
mode. For example, w en t e water eater setpoint temperature is 55OC and
t e boiler temperature rises to 67OC (5OC over t e so-called priority
temperature), t e controller s uts off t e fan.If t e boiler temperature
reac es 80OC, t e C.H. pump will be activated. If t e temperature continues
to rise, t e alarm will be activated at 85OC. Suc condition may appear w en
t e water eater or t e pump is damaged or w en t e sensor as been
improperly installed. However, if t e temperature drops, t e controller will
activate t e fan at 66OC and it will remain in t e duty mode maintaining t e
priority temperature of 62OC.
- 17 -
Alarm
Temperature Too
High

ST-85 – USER'S MANUAL
III.e) Monitoring the flue gas outlet temperature
T is sensor constantly monitors t e flue gas outlet temperature. If t e
sensor is damaged, disconnected from t e controller or removed from t e
flue conduit, Flue Gas Sensor Damaged massage will appear on t e
display. T is will cause t e controller to switc to t e emergency mode. In
suc case, only boiler temperature is used. T e controller is operated using
only t e boiler sensor and t e zPID function remains active wit out t e flue
gas outlet sensor.
III.f) Fuse
T e regulator as a network protection WT 3.15 A tube fuse. Hig er
current ratings may cause damage to t e controller.
IV. Maintenance
Before and during t e eating season, t e ST-85 controller s ould be
c ecked for condition of its cables. You s ould also c eck if t e controller is
properly mounted and clean it if dusty or dirty. It is advisable to measure
grounding parameters for t e motors (central eating pump, ot
consumption water pump and fan)
- 18 -
23 Oc 98 Oc 50%
C.H. Flue Fan D

ST- 85 – USER'S MANUAL
ST-85 Technical Specifications
No. Specification Unit
1Supply Voltage V 230V/50Hz +/-10%
2Power consumption 5
3Ambient temperature OC 5÷50
4
5
Circulation pump outlet load
Fan outlet load
A
A
0,5
0,6
6Temperature measurement range OC 0÷90
7Measurement accuracy OC 1
8
9
Sensor thermal resistance
Fuse insert
OC
A
-25÷90
3,15
V. Assembly
ATTENTION: all assembly works must only be carried out by qualified
persons. During assembly, t e device must be disconnected (make sure t e
power cord is unplugged)!
ATTENTION: improper cable connections may damage t e regulator!
T e regulator may not be operated in a closed-circuit central eating
system. It is necessary to provide for safety valves, pressure valves and a
surge tank in order to prevent water from boiling in t e central eating
system.
V.a) Cable Connection Diagram for Controller
Pay special attention to cable connections during assembly. Especially, t e
ground wire s ould be connected properly.
- 19 -

ST-85 – USER'S MANUAL
- 20 -