TECH ST-77 Montageanleitung

ST – 77

Manual Guide

ST-77 – Manual Guide

TECH

Declaration of compatibility number 3/2004

We, TECH company, ul St Batorego 14, 34-120 Andrychów, declare with

the full responsibilty, that thermoregulator ST-77 230V, 50Hz produced

by our company complies with the demands of the Decree of the Ministry

of Economy, Employment and Social Politics (Dz U 03 49 414) from 12th

March 2003, implementing decisions of Low Voltage Directiv

73/23/EWG, and the Decree of the Ministry of Infrastructure (Dz U

03 90 848) from 2nd February 2003 impplementing decisions of EMC

Directiv 89/336/EWG

Harmonised standards PN-EN 60730-2-1:2002 were used to evaluate

compatibility

For the first time, the product was marked CE on 4th May 2004

Co-owners:

Paweł Jura, Janusz Master

Andrychów, 4th May 2004

- 2 -

TECH

CAUTION!

LIVE ELECTRIC DEVICE!

Before doing anything demanding current

supply (e g connection of wires,

installation of the device, etc ) one must

make sure that the regulator is not live!

The device should be intstalled by a person

with adequate electrical training and

certificates

Before starting the programmer one

should measure the effectiveness of

neutralization of electric engines, boiler, as

well as measure insulation of electric

wiring

- 3 -

ST-77 – Manual Guide

I. Description

Temperature regulator ST-77 is to be used with the Central Heating

Boilers It steers the pump of water circulation, the pump of Consumed

Hot Water (C H W ), the fan and the fuel feeder

●if the temperature of the boiler is lower than the Set Temperature, the

regulator is in a cycle of ork in which the fan works all the time; fuel

feeder working time is set up by the user (both the time of work and

the time of break have to be set up)

●if the themperatre of the boiler is equal or higher than the Set

Temperature, the regulator is in the cycle of support

- 4 -

Button MINUS

Button that allows

for escaping from the

menu and cancelling

the set up

Button that allows

for entering menu

and confirming the

set up

Button PLUS

TECH

II. Functions of the regulator

This chapter describes the functions of the regulator, the way of

changing the set up, and the way of using the menu

II.a) Main page

During the normal work of the regulator, the LCD projector shows

the main page, which gives the following information:

●The temperature of the boiler (CH)

●The set temperature

This screen enables quick change of the Set temperature by using

buttons PLUS and MINUS Pressing button MENU takes user to the first

level of the menu The projector shows first two lines of the menu One

can move in ech of the menus by using buttons PLUS and MINUS

Pressing button MENU takes the user to the further menu or starts the

chosen option ESCAPE takes the user back to the previous menu In the

case of projecting the main page, pressing (and holding) the button

ESCAPE will show the screen informing of turning the pump of consumed

hot water on or off

II.b) Manual work

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62oc 72oc

CH SetTemp

Manual Work

WorkingTimeoffee

62oc 72oc

CH SetTemp

Feeder

Fan

ST-77 – Manual Guide

For the user’s comfort, the regulator was equipped with the Manual

Work function This function allows for turning each element of the

system on and off regardless of the other elements

Pressing button MENU starts the fuel feeder The feeder works until

button MENU is pressed again

Pressing MENU turns the fan on/off

Pressing button MENU turns the water pump on/off

Pressing button MENU turns the CHW pump (boiler pump) on/off

Pressing button MENU turns alarm on/off (see also the chapter

Alarm)

- 6 -

Feeder

Fan

Feeder

Fan

Pump

CHW Pump

Alarm

CH Pump

CHW Pump

TECH

II.c) Working time

This option allows for setting up the working time of the

fuel feeder Working time set up depends on the type used fuel as well as

on the type of the boiler

II.d) Break Time

Button Feeder Break Time is for setting break in the feeder working

time The break has to be adequate to the type of fuel used in the boiler

Wrong set up of both the feeder working time as well as the feeder break

time may cause faults in the work of the boiler, i e coal may not get

burnt in full or the boiler may not reach the set temperature Choosing

the right times allows the boiler to work well

II.e) Temperature of turning CH and CHW pumps on.

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62oc 72oc

CH Set Temp

12 min 3 sek

Feeder BreakTime

Feeder Work Time

Feeder BreakTime

62oc 72oc

CH Set Temp

62oc 72oc

CH Set Temp

Feeder Work Time

Feeder BreakTime

min 3 sek

Feeder Work Time

ST-77 – Manual Guide

This function allows to set up the temperature of turning CH and

CHW Pumps on (it’s the temperature measured in the boiler) Below the

set temperature both pumps don’t work, above the set temperature both

pumps are turned on, but they work depending on the settings, i e they

are turned on alternately (see function priority pump or constant CH

pump)

II.f) CHW Hysteresis

This function allows for setting up the hysteresis of the set

temperature in the boiler It is a difference between the set temperature

(so the temperature the user wants to have in the boiler) and the

temperature that is in the boiler at a certain time (e g if the set

temperature equals 55 C and hysteresis equals 5 C: after reaching the

set temperature, i e 55 C, the CHW pump turns itself off and the CH

pump turns itself on; the CHW pump will turn itself on again after the

temperature drops to 50 C)

II.g) Hysteresis

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Feeder BreakTime

CH and CHW Pump

35 oc

CH and CHW Pump

62oc 72oc

CH Set Temp

62oc 72oc

CH . Set Temp

CH and CHW Pump

CHW Hysteresis

1 oc

CHW Hysteresis

TECH

This function allows for setting up hysteresis of the set temperature

It is the difference between the output temperature in the support cycle,

and the temperature needed for return to the cycle of work (e g when

set temperature equals 60 C, and hysteresis equals 3 C, the boiler will

enter the cycle of support after reaching temperature of 60 C, whereas it

will return to the cycle of work when the temparture drops to 57 C)

II.h) an Speed

This function steers the speed of work of the fan It can be regulated

between speed 1 nad speed 6 (it can be said that these are the fan’s

gears) The higher the gear the faster the fan works Gear 1 is fan’s

minimum speed and gear 6 is fan’s maximum speed

Changes between gears can be introduced by pressing buttons PLUS or

MINUS The fan always starts working with the maximum speed –

thanks to this set up it is possible to turn the fan on even when the

engine is dusted

II.i) Activation of CHW Pump – Boiler’s priority

Activation of CHW pump (by pressing button ON), will make

regulator work in the process called Boiler’s priority In this process CHW

pump (boiler’s pump) is on until it reaches the set temperature, then it is

automatically turned off and the CH pump is activated

- 9 -

Fan Speed

Hysteresis

Fan Speed

62oc 72oc

CH Set Temp

CHW Hysteresis

Hysteresis

2oC

Hysteresis

ST-77 – Manual Guide

To change the set temperature of CHW pump, press button Escape-

wyjscie (hold it for a few seconds) and the screen will project boiler’s set

temperature and boilers actual temperature

To change the temperature range use buttons PLUS or MINUS

After a few seconds the projector goes back to its initial stage After

reaching the boiler’s set temperature, CHW pump is turned off and the

CH pump is turned on

In this process, the work of the fan and the feeder is limited to the

temperature of 62 degrees in the boiler It prevents the boiler from over-

heating This state of the boiler will be supported until it reaches the the

set temperature If the set temperature is reached, CHW pump is turned

off and the CH pump is turned on

CH pump continues working until the temperature in the boiler drops

below the set temperature Then CH pump is turned off and the CHW

pump is turned on

The process of ‘boiler’s priority’ makes the boiler heat the consumed hot

water first and only afterwards heat the water in radiators

Caution! Non-return valves should be installed on the CHW and CH

pumps’ circulations The valve installed on the CHW pump prevents from

taking the hot water out of the boiler The valve installed on CH pump

does not let the hot water that heats the boiler be used in the house

II.j) Room regulator

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62oc 72oc

CH Set Temp

CHW Pump

62oc 72oc

CH Set Temp

Fan Speed

CHW Pump

off

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