Neptronic PTC User manual

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neptron PAGE1NEP04/03 www.hvacquick.com 877-711-4822
Control Equipment
PTC
modulating wall
thermostat
PTCPTC
PTCPTC
PTC

Control Equipment
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PTC
specifications:specifications:
specifications:specifications:
specifications:
powerinput:
powerconsumption:
signaloutputs:
outputimpedance:
ambienttemp:
setpointrange:
deadband:
proportionalband:
controlalgorithm:
nsb input:
nsboverride:
nsbalgorithm:
minimumposition:
tpmperiod:
tpmrange:
tpm 2 inhibit input:
contact outputs:
externalsensor:
display type:
defaultdisplay:
programming:
memoryretention:
24vac±20%
2vaminimum
17va maximum (all outputs used at maximum
currentoutput)
0-10 vdc, cooling
0-10vdc, cooling highdemand
0-10vdc, heating
0-10vdc, heating high demand
2 TPM outputs, 1 or 24 to 29 vdc
0.5- 5 vdcactual temperature
3 KΩmaximum, heating & cooling outputs
100 Ωmaximum tpm output 1
250 Ωmaximum tpm output 2
20KΩmaximumactualtemperature output
-200to500C(-40to1200F)
00to380C (320to990F)
0.30C(±0.50F)
10to90Cuser programmable (20to160F)
P.I.integral and terms auto-tuned
contactclosure, programmable for0 to 150C
(00to270F)deadbandexpansion
2hours
deadbandexpansionaroundsetpoint.Opti-
mized soft start for peak electrical demand
reduction.Warmup ramp timeprogrammable
over0 to 99 minutes
0to 75% independently adjustablefor heating
and cooling outputs. Does not affect high
demandoutputs.
2 seconds
tpm 1: 0 to 100% of heating demand
tpm 2: 50% to 150% of heating demand
contact closure to inhibit (set to zero) tpm 2
outputregardlessofdemand
2 independent dry contacts (1 amp maximum
resistiveload)independentlyprogrammable
forheating or cooling with selectableswitch-
ing points from 20% to 90% of demand
optional DS100 duct or WS100 wall
2 digit led (7 segment type)
actual temperature selectable in 0C or 0F.
menudrivendirectly from thermostat
noexternaltools required.
10years minimum
dimensions:dimensions:
dimensions:dimensions:
dimensions:
(120mm) 4.73 in.
( 74 mm) 2.91in.
( 23 mm) 0.90in.
height:
width:
depth:
connections:
1. common
2. 24 vac
3. external sensor
4. nsb input
5. heating output
6. heating high
demand output
7. cooling output
8. cooling high
demand output
9. tpm 1 output
10. tpm 2 output
11. contactA
12. contactA
13. contact B
14. contact B
15 tpm2 inhibit input
16. actual temp. output
fig. #1
fig. #2
(accesscover)

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Control Equipment
PTC
description:description:
description:description:
description:
The ptc is a powerful microprocessor based menu driven temperature controller for heating and cooling
applications. Please readthefollowinginformationtomaximizethepotentialof thispowerfulthermostat.Thefollowing
aresomehighlightsof theptc:
*p.i.analogheatingandcoolingoutputs
*2sequentialp.w.m.heating outputstoproportionally
drive solid state relays
* 2 fully programmable dry contact relays to be used in
heating and/or cooling applications
* high signal selections outputs from multiple ptc's to
be used by a master system
*individuallyprogrammable night setback/setup
*nightset backoverride
*intelligentself-optimizingmorning selfstart
*minimumpositionsettingforheating and cooling output
*programmableminand maxallowabletemperaturesetting
*selectableinternal/externalsensor
* led display
*programmableCelciusorFahrenheitdisplay
*plugin easilyremovablethermostatbody
*attractive flat casing
buttonbutton
buttonbutton
button
functions:functions:
functions:functions:
functions:
The up button is used to increase
thetemperatureset point (warmer)
while the thermostat is operating in
user mode. The up button is also
usedtoincrease a given parameter
wheninprogrammode.
Similarly, the down button is used
todecreasethe temperature
setpoint(cooler) or decreasea
parameterinprogrammode.
The menu button is used to place
the ptc into program mode, and to
advancetheprogramfunctionto
the next menu.
The enter button is used to store
theprogramfunctionparameter into
memory. Once a value is stored in
memory, the ptc will remember that
valueevenifthepoweris turned off
atthe thermostat for several years.
Whena parameter is being stored,
the led display will flash in a
circular fashion. You will notice that
whenchanging the setpoint, the led
display will do a circular flash. This
is because a new setpoint is being
entered into the memory of the ptc.
Inprogram mode if this flashdoes
not occur you have not stored that
parameterinto memory! if you do
not wish to change the value in me-
mory of a parameter, simply do not
press the enter button and push
the menu button to go to the next
programlevel.
Night Set Back Indicator: When NSB
is ON, the NSB Indicator will light. If
you wish to locally override the NSB,
momentarily push either the UP or
DOWN button. NSB will be cancelled
for 2 hours and the NSB light will turn
off until the NSB is re-established.
hole for
mounting
screw
temperature
and function
led display
up
button
minimum
position
HEAT
minimum
position
COOL
night
set back
indicator
down
button
menu
button
enter
button
sensor
shunt
exterior / interior
modes
fig. #3

Control Equipment
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PTC
1common
224 vac
3external temperature sensor.
Ifan externaltemperaturesensor
is used, it must be connected
between pins 1 and 3. When
using an external temperature
sensor, the sensor selection
jumpermustbeplaced in the ext
position. Neptronic wall sensor
ws100orductsensords100must
beused.
4night set back input. To en-
largethedeadbandduringunoc-
cupied periods (night set back),
short pins 4 and 1. The amount
of deadband expansion is pro-
grammedat the thermostat.
5heating output 0 to 10vdc.
This is the analog proportional
heating output. It may be used
to control an actuator.
6 heatinghigh demand output 0
to 10vdc. This output may be
placed in parallel with many ptc
heating high demand outputs to
findthehighest heating demand
amongmanyzones. This signal
can be used to control a voltage
sensitiverelay (ie; neptronicvrc2
orvrc4)in ordertoturnonaheat-
ing system via stages.
ptc terminal connection descriptions:ptc terminal connection descriptions:
ptc terminal connection descriptions:ptc terminal connection descriptions:
ptc terminal connection descriptions:
7cooling output 0 to 10vdc. This
is the analog proportional cooling
signal. It may be used to control
anactuator.
0to100%oftheheatingdemand.
Thisoutputis capable of supply-
ing up to 100mA of current so it
may be used to actuate several
triacswitches,orevenathermo-
electricvalvedirectly.
10 timeproportionalmodulation
output2:1or24vdcoutput. This
output is similar to pin 9 except
that the output is proportional to
50 to 150% of the heating de-
mand. Inaddition the maximum
current output is 100mA.
11 & 12 contact A. This con-
tactisnormallyopen. It will close
if the demand exceeds the pro-
grammedvalue. thecontactrat-
ing is 120V 1A resistive.
13 & 14 contact B. This con-
tactisnormallyopen. It will close
if the demand exceeds the pro-
grammedvalue. Thecontactrat-
ing is 120V 1A resistive.
15 tpm 2 inhibit. This input,
when shorted to pin 1, will turn
off time proportional modulation
2 regardless of the heating de-
mand.
16 actual temperature output,
0.5 to 5vdc. This output is pro-
portional to the actual tempera-
ture seen by the thermostat. A
chartoftemperatureversusvolt-
age is shown in fig #5. The out-
put is high impedance and any
attempttodrawmorethan0.5mA
from this output will result in in-
correct readings and may result
inimpro-per function ofthe ther-
mostat.
8cooling high demand output 0
to 10vdc. This output may be
placed in parallel with many ptc
cooling high demand outputs to
find the highest cooling demand
among many zones. This signal
can be used to control a voltage
sensitiverelay(ie,neptronicvrcor
vrc4) in order to turn on a cooling
unitvia stages
9time proportional modulation
output1; 1 or 24vdc. Thisheating
output may be used to modulate
heatingelementsviaatriacswitch
or solid state relay. The output
rangeisproportional to
fig. #4

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Control Equipment
PTC
C
0
F
0
pmetV
0230.5
1 43 9.4
25.538.4
3 5.73 7.4
4936.4
5 14 5.4
6344.4
7 5.44 2.4
85.641.4
9 84 0.4
01059.3
11 25 8.3
215.356.3
31 5.55 5.3
41754.3
51 95 3.3
61161.3
71 5.26 03
815.469.2
91 66 8.2
02866.2
12 07 5.2
225.174.2
32 5.37 3.2
42571.2
52 77 0.2
62979.1
72 5.08 8.1
825.286.1
92 48 5.1
03684.1
13 88 3.1
235.982.1
33 5.19 0.1
433969.
53 59 48.
637937.
73 5.89 26.
839925.
temp: vdc: programming:
All of the programming of the ptc is carried out at the thermostat. No program-
mingtool is required, andthe programming sequencesare all menu driven.
Description of all programming steps is done in the order in which they appear
while actually programming the thermostat. Please look at fig. #3 for the
locations of up, down, menu, and enter buttons.
In many cases you will never need to program the ptc thermostat. The standard
factory settings are suitable for most applications. Alist of the standard factory
settings are shown below. If you want to change any of these settings, follow
the directions in the next section.
ptc thermostat function and factory settings
functions standard factory setting
setpointmaximum 300C - 860F
setpointminimum 150C - 590F
contact A closefor >50% coolingdemand
contact B closefor >50% heating demand
nightset back deadband 100C - 180F
proportionalband 20C - 3.50F
soft start ramp time 00minutes(off)
display type 0C
calibration 0
fig. #5

Control Equipment
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PTC
program level organization:
Each function is made of 2 steps:
Step 1 The function will be displayed for 2 seconds followed by message 2.
Step 2 is adjusted by pushing the up or down buttons. To change to the next function, press the MENU button.
If you wish to skip over a function, simply push and hold down the MENU button.
* Note: If you want to program all functions in 0F skip to message #8 "d l "
step 1 of each function will be displayed (in order) for 2 seconds, and then the ptc will skip to the next function.
ptc thermostatprogramming modes
When the ptc is turned on, it automatically displays the actual temperature in 0C. The thermostat is fully functional
and it uses default factory settings
Setpoint change - To check the setpoint momentarily press the UP or DOWN button. The display will automati-
cally show the setpoint.
To change setpoint press the UP or DOWN
buttonuntilthe required
new set point is displayed.
Tochangeany otherparametersofthe thermostat, see all the programming levels as listed below in order of
apperancealong with thedisplay messages.
noitcnufmargorp yalpsidts1 yalpsidts2
mumixamtnioptes
IH
83ot0
muminimtnioptes
OL
83ot0
tnioptesAtcatnoc
AC
9C...2C,9H...,3H,2H
tnioptesBtcatnoc
bC
9C...2C,9H...,3H,2H
dnabdaedkcabtesthgin
bS
51ot0
dnablanoitroporp
bP
9ot1
).nim(emitpmartratstfos
tr
99ot0
epytyalpsid
ld
FroC
noitarbilacerutarepmet
LC
5ot5-
1
2
3
4
5
6
7
8
9

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Control Equipment
PTC
program level organization: cont.
Whenthe ptc is turned on. itis automatically in user
mode. Inthismodeonlythesetpointmaybechanged
(within the limits set by the minimum and maximum
setpoint settings) by pressing the up or down
buttons.
Toenterprogrammode,pushtheMENUbuttononce.
The first program level message ( hi ) will be dis-
played for 2 seconds, followed by the maximum
setpoint setting. Pushingthe upordown buttons,
setthemaximumsetpointyou
wish the user to have access
to. Once that is done, push the ENTER button to
store this value in memory.
Push MENU onceagain. Thesecondprogramlevel
message(Lo ) willbe displayed for2
seconds, followed by the minimum
setpointsetting.
Pushing the upor down buttons, set the minimum
setpoint you wish the
user to have access to.
Once that is done, push the ENTER button to store
thisvalue in memory.
Note that if you wish to fix the temperature setpoint
to one value (ie; not adjustable by the user), set the
(hi) and ( Lo ) values to the desired temperature
setpoint.
1
2
Push MENU again. Thethird program level message
( Ca ) will be displayed for 2 seconds,
followed by the setpoint of contact A. It
isdisplayed in the following format:
Pushing the up or down buttons will change the
contact setpoint. When you have arrived at the setpoint
you wish, push the ENTER button to store this value in
memory.
3
message contact setpoint
H2 heating at 20 % demand
H3 heating at 30 % demand
H4 heating at 40 % demand
H5 heating at 50 % demand
H6 heating at 60 % demand
H7 heating at 70 % demand
H8 heating at 80 % demand
H9 heating at 90 % demand
C2 cooling at 20 % demand
C3 cooling at 30 % demand
C4 cooling at 40 % demand
C5 cooling at 50 % demand
C6 cooling at 60 % demand
C7 cooling at 70 % demand
C8 cooling at 80 % demand
C9 cooling at 90 % demand

Control Equipment
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PTC
program level organization: cont.
Push MENU again. The fourth program level mes-
sage( C b ) will bedisplayed for 2 se-
conds,fol lowed by thesetpoint of
contact B. The format is the same as described
abovefor contact A,and adjustments to thesetpoint
are made in the same way.
Contact A and Contact B are totally independent.
You may select two heating contacts, two cooling
contacts, or one heating and one cooling contact.
Theirsetpoints can be whereveryou choose.
PushMENUagain. Thefifthprogramlevelmessage
( S b ) will be displayed for 2 seconds,
followed by the night set back
deadband. This is the total deadband (over and
under the setpoint) applied when the night set back
terminal is connected to common.
Using the up or down button, adjust the night set
back deadband to the value
requiredandpressENTERto
storethat value in memory.
PushMENU again.Thesixthprogram level message
(Pb)willbedisplayed for 2 se-conds,
followed by the proportional band.
The ptc operates using a p.i. algorithm, with the
integral terms optimized automatically by the ther-
mostat. But since the proportional band has the
greatest effect on the output, adjusting the propor-
tionalband
4
will allow you to tailor the response of the ptc to any
given application. For most V.A.V applications, the
usual proportional band is 2 to 30C (3.5 to 5.50F ). For
many applications where hot or chilled water coil is
used, a typical proportional band is 3 to 6 degrees 0C
(5.5to 10.50F).
Using the up or down buttons, adjust the propor-
tional band to the value re-
quired. Press the ENTER
button to store the value in memory.
PushMENUagain. Theseventhprogramlevelmes-
sage ( r l c ) will be displayed followed by
the soft start ramp time. Since the soft
start feature is only useful if modulating electric heating
is used, you may disable this feature. To turn off the
soft start function, set the soft start ramp time to 00. If
modulating electric heating is used, normally the soft
start ramp time is set the same as the morning warm
upperiod.
Push the up or down buttons to set the soft start
ramp time to the number of
minutes required.
Push the ENTER button to store this value in memory.
3
5
6
7

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Control Equipment
PTC
program level organization: cont.
Push MENU again. The eighth program level mes-
sage (d l) will be displayed for 2 sec-
onds, followed by the display type
showninusermode. There are twochoices: either
degreesCelsius(0C)ordegrees Fahrenheit (0F).
Tonormallydisplay the temperature setpoint inCel-
sius, press the up or down button until ( C ) is
displayed.Tonormally
displaytheactualtem-
peratureinFahrenheit, press the
up or down button until ( F ) is displayed.
Push the ENTER button to store this
parameter in
memory.
Push MENU again. The ninth program level mes-
sage (CL) willbedisplayedfollowed
by the temperature calibration
adjustment.
The ptc's temperature sensor is factory calibrated.
Howeveryoumaywishtoadjustthiscalibration,par-
ticularlyifyouareusing an external temperaturesen-
sor. To do this, simply measure the actual tempera-
ture in the room and compare it to the actual tem-
perature displayed by the ptc.
If,for example, the ptcwas reading 2 degreeslower
than the actual temperature, set the temperature
calibration adjustment to -2.
Adjustthe calibration value by pushingthe
up or down buttons.
Whenfinished, push ENTER to store the calibration
valueinmemory.
This is the last programming step. To put the ptc
thermostat back into user mode, push MENU once
again.
Note that if the ptc thermostat is left in program mode
the control section of the thermostat is not functional.
Therefore it is always a good idea to leave it in user
modewhenyouarefinishedprogramming.
Restoringthe standard factorysettings
If you wish to restore the standard factory settings on
the ptc, then follow these steps:
1) turn off the power to the thermostat. This may be
doneby unplugging the ptc from the sub-base.
2) push and hold down the menu, enter, and up
buttons at the same time.
3) turn the power back on to the ptc (or plug it back
intoit's sub-base).
The thermostat must be at this point, in the program
modeif the MENU button was helddown for too long.
To get back into user mode, push and hold down the
MENU button until you see the display show (C L).
Thenreleasethe MENU button, and
momentarilypush the MENUbutton
once again.
9
8

Control Equipment
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PTC
installation:
designed to fit on
standard2020electrical
box, thermostat box, or
directlyon dry-wall.
ensuredtoalign
pin guides with the base-
boardforproperfitting.
toopen:
grab top and bottom of
front cover and pull in a
downwarddirection.
dimensions for wall mounting.
(Suggested cut-out for terminal
block.)

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Control Equipment
PTC
typical applications:
centralcooling withbaseboard heating(on/off)
BBMS2000
damper
motor
ptc
modulatingwall
thermostat coolingunit
Terminalstrip
Fanon
24hours
L1L2
R
R
Heater
Notes:
use intermediate relayR for highcurrent load (over1A)
dischargeairtemp controlwith remotetempindicator
return
air duct
heater
fresh
air n.c.
n.o.
ds100
bbms2000
damper
motor
(interlinked
with
push rods
andball joints)
triac
switch
.5 to 5 vdc remote
temp.indicator
ptc
modulating
wall
thermostat
Notes: Set sensor select jumper to ext.
common
24vac
L2 L1
+
-

NATIONALENVIRONMENTALPRODUCTSLTD.,INC.MAINTAINSAPOLICYOFCONTINUALPRODUCTDEVELOPMENT;THEREFORE,INTHEINTERESTOFTECHNICAL
IMPROVEMENTS, THE FIRM RESERVES THE RIGHT TO CHANGE THE DESIGN, SPECIFICATIONS OR COMPONENTS OF THE EQUIPMENT WITHOUT PRIOR NOTICE.
www.hvacquick.com 877-711-4822 NEP04/03
national
environmental
products
montreal,canada
Control Equipment
PTC
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ptc
modulating
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ptc
modulating
wall
thermostat
BBMS2000
damper
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BBMS2000
damper
motor
triac
switch heater
heater
+
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L1
triac
switch
+
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L1
NSB on when closed
VRC
common
24vac A/C stage 1
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