Tekmar 512 Data Brochure

- Data Brochure
Programmable Thermostats 510 - 512 : Operation

Table of Contents

Display Operation....................................................... pg 1
General ....................................................................... pg 1
Sequence of Operation .............................................. pg 2
Type 510 (One Stage Heating) .......................... pg 2
Display / Keypad Operation
The thermostat's display has four distinct fields. These fields are the Menu field, the Item field, the Number field and the Status
field. The four buttons on the face of the thermostat are used to navigate through the menus and items to view and / or adjust the
desired settings.
Displays the
current
menu
Displays the current
status of the
thermostat's inputs,
outputs and operation

General

CYCLES PER HOUR (HEAT CYCLE and COOL CYCLE)
The thermostat operation is based on cycles per hour. The number of cycles per hour is adjustable through the HEAT CYCLE and
COOL CYCLE settings in the Adjust menu. During each cycle that heating or cooling is required, the thermostat turns on the Heat or
Cool relay(s) for a calculated amount of time. This amount of time is the "on time". The on time is calculated based on the require-
ments of the zone. If the zone requires more heating or cooling, the appropriate on time is increased. If the zone requires less heat
or cooling, the appropriate on time is reduced.
In order to prevent short cycling of the heating relay(s), the thermostat ensures
that the relay(s) remains on or off for a minimum amount of time. In order to pre-
vent short cycling of the Cool relay, the minimum cooling on time and minimum
cooling off time settings are adjusted in the Adjust menu of the 512.
An Auto Cycle setting is available for both the heating cycle and the cooling cycle.
This setting allows the thermostat to determine the best number of cycles per
hour that balances both temperature swings and equipment cycles.
Menus ......................................................................... pg 5
Error Messages .......................................................... pg 7
Displays an abbreviated
name of the selected item
Displays the current value
of the selected item
Selects Menus, Items
and adjusts settings
1 of 8
Type 512 (Two Stage Heating) .......................... pg 3
Type 512 (Heat / Cool) ....................................... pg 4
Display Symbols
Warning
Displays when an error exists.
Access Level
Displays when in the user
access level.
Early Start
Displays when the thermostat
is in early start.
Heat One
Displays when the heat one
contact is on.
Heat Two
Displays when the heat two
contact is on.
Cool One
Displays when the cool one
contact is on.
Cycles Per Hour
on on
off
⇐ Cycle Length ⇒
© 2002
D 510A
03/02
on
off off
Time
D 510A - 03/02