tekmar 662 Snow Detector & Melting Control - Manual

Snow Detector & Melting Control 662
Floating / Variable Speed / 4-20 mA
Test
Do not apply power here
H1
1002
Power
Remote
Item
Max. Supply
30
130 sec
230
Motor Speed /
Pump Response
CWCO
10
30 °F
50
∆T Max.
Sensitivity
Melting
Min. Boil Return
Idling
29 °F
Off 35
24
50 %
20 80
Surface
39 °F
34 44
100 °F
Off 150
60
150 °F
100 200
0 °F
-20
25
Red
Sen Blk
Sen
Blu
Sen
17 18 19 20 21 22 23 24 25 26 27 28
Yel
Sen
Brn
Sen
Com
Sen
Rem
En
Bret
Sen Com
Sen
Ret
Sen
Sup
Sen Out
Sen
1 2
Melt
3 4
Boiler
11 12 13 14 15 16
4-20
+ –
Pump 1 Pump 2
Opening
Boiler
Warning
Closing
CWCO
Melting Idling
WWCO
Maximum
∆T
Maximum
Supply Minimum
Return
Water
Supply Usage ( ∆T x hrs)
Slab
Boiler Return Actual ∆T
% Output
To change between
°F and °C, press and
hold for 1 sec.
R LR 58223
120 V ac 50/60 Hz 300 VA
120 V ac 6 A 1/3 hp, pilot duty 240 VA 2 A
120 V ac 50/60 Hz 2.2 A 1/6 hp, internally fused
24 V ac 10 A, pilot duty 48 VA 2 A
120 V ac 10 A 1/3 hp, pilot duty 240 VA 2 A Power
System Pumps
Variable Pump
Mix Relays
Other Relays
Enclosed Energy Management Equipment
Manufactured
in Canada by
Date
S/N
tekmar
motor
Opn
Mix
Cls
Mix
Warning
5 6 9 7 8
P1
Pmp
P2
Pmp
Com
Pmp Power
L N
Var
Pmp
Use Nº 20 AWG or larger copper conductors rated for at least 75 °C / 300V
Input: System Supply
Sensor 071 (Included)
Input: Outdoor
Sensor 070
(Included)
Input: System Return
Sensor 071 (Included)
Input: Boiler Return
Sensor 071 (Included)
Input: Remote Enable
Signal. (Optional)
M
Output: control
Floating Action
OR
Output: control
4-20 mA device Output:
Turn on boiler
Output: Turn on
system pump P1
Output: Turn on
boiler pump P2
Output:
operate pump at
varying speeds
Output:
Warning relay is
activated if sensor
fault is detected
Output:
Melt relay is closed
when control is
in melting mode.
120 Vac
Power Supply
M
OR
Input: Slab Sensor 072 (Included)
Detects slab temperature
only. Does not detect Snow/Ice.
Target ∆T
The Snow/Ice Sensor is installed in a hostile environment.
It should be cleaned and checked on a regular basis.
10
Off
Input: Snow/Ice Sensor 090 installed with Sensor Socket 091. (Optional)
Both of these components must be ordered separately.
N R T L / C
F C
OUTSIDE
29
Com
Mix
1000 Ω
4-20
2094
1234567
Water is detected
by the sensor
- Data Brochure
Snow Detector & Melting Control 662
The tekmar Snow Detector & Melting Control 662 is a microprocessor-based control which,
together with the Snow/Ice Sensor 090, activates and controls the rate of heat delivery to a snow
melt system. This versatile control has three modulating outputs to control the heat delivery for
most pump and/or valve arrangements. Protection of both the snow melt slab and the boiler is
achieved through several safety features. Faster pick up times are also ensured through a
viscosity compensation function which optimizes the rate of heat delivery to the slab during start
up. The 662 combines all the necessary features to make snow melting safe and trouble free.
Control is maintaining
Min. boiler return temperature
Control is limiting heat
output to Max ∆T setting
Weather is too cold,
snow melting is off
120 Vac power
supply is on
Terminal Plugs
Motor Speed setting
Snow Detector & Melting Control 662
Mixing Operation
Power
Remote
Item
Pump 1 Pump 2
Opening
Boiler
Warning
Closing
CWCO
Melting Idling
WWCO
Maximum ∆T
Maximum
Supply Minimum
Return
Water Supply
Return
Slab
Boiler Return Target ∆T Actual ∆T % Output
To change between °F and °C, press and
hold for 1 sec.
R
N R L T / C
F C
OUTSIDE
LR 58223
Actual slab ∆T
Target slab ∆T
Sensor Sensitivity to
water
Cold Weather Cut-off
temperature
Max. Temperature
drop across slab
Min. Boiler Return
temperature
Maximum Supply
temperature
Control is in
Idling mode
Current % Heat
Output to slab
Boiler return
temperature
07/99
D 662
Valve is
opening/closing
Boiler pump is on
System pump is on
Fault warning
Boiler operating
LCD display
item select
Supply temperature to slab
Slab surface temperature
Control is limiting supply
temperature to Max.
Supply setting
Snow detected:
control is in
Melting mode
Slab is warm enough,
no snow melting is required
Remote Enable
Signal present
Desired slab surface
temperature during
melting mode
Desired slab surface
temperature during
idling mode
Test button to initiate
test sequence
Testing . . . . . . . . . . . . . pg. 9
Error Messages . . . . . . pg. 10
Technical Data . . . . . . . pg. 12
Limited Warranty . . . . . pg. 12
Sequence of Operation pg. 2
Installation . . . . . . . . . . pg. 3
Settings . . . . . . . . . . . . pg. 7
Display Operation . . . . pg. 8
Relative Energy
usage in ∆T x Hours