Taco Viridian VR1816 User manual

Viridian VR1816
Instruction Sheet
102-499
SUPERSEDES: New EFFECTIVE: August 1, 2014
Plant ID No. 001-4230
Infinitely Variable Speed, ECM High-Efficiency Circulator
DESCRIPTION:
The Viridian VR1816 circulator is an infinitely variable speed wet rotor circulator
with an ECM, permanent magnet motor. Operating modes include infinitely
adjustable fixed speed or self-adjusting proportional or constant pressure variable
speed. Its high efficiency motor reduces power consumption by up to 85% com-
pared to equivalent AC permanent split capacitor circulators.
APPLICATION:
• Maximum operating pressure: 145 psi
• Maximum water temperature: 230°F (110ºC)
• Electrical specifications:
Voltage: 110-120V, 50/60 Hz, single phase
Maximum operating power: 44W
Maximum amp rating: 0.54
• Equipped with a cast iron casing and should be used for closed
loop systems only.
• Taco circulator pumps are for indoor use only employer uniquement a
l’interieur.
• Acceptable for use with water or maximum of 40% water/glycol solution.
FEATURES:
• 3 operating modes:
- Fixed speed ( ) - infinitely adjustable min/max settings
- Constant pressure ( ), variable speed - 3 constant pressure differential curves (5, 10, or 15 feet of head)
- Proportional pressure ( ), variable speed - 3 variable pressure differential curves (High, Med, or Low)
• Multi-color LED display showing operating mode and error code diagnostics.
• Use with a Taco ZVC Zone Valve Control or SR Switching Relay for ON/OFF operation.
• Integral Flow Check (IFC) is included in carton. Simply press into discharge flange if required.
• Nut capture feature on flanges for easier fit up.
• Whisper quiet operation.
INSTALLATION:
WARNING: Do not use in swimming pool or spa areas. Pump has not been investigate for these applications.
AVERTISSEMENT: Ne pas utiliser ans une piscine ou un spa. La pompe n'a pas été étu iée pour ces applications.
CAUTION: The a ition of petroleum base flui s or certain chemical a itives to systems using TACO equipment
voi s the warranty. Consult factory for flui compatibility.
ATTENTION: L'ajout e liqui es à base e pétrole ou e certains a itifs chimiques à es systèmes utilisant un
équipement TACO annule la garantie. Consultez le fabricant pour connaître la compatibilité e liqui es.
CAUTION: Installations at elevations over 5000 feet must have higher fill pressure of 20 psi minimum to prevent
pump cavitation an flashing. Premature failure may result. A just expansion tank pressure to equal fill pressure. A
larger size expansion tank may be require .
ATTENTION: Des installations à es altitu es e plus e 1600 mètres oivent présenter une pression e remplissage
plus élevée e 20 psi au minimum afin 'éviter toute cavitation ou flashing e la pompe. Une éfaillance prématurée
peut en résulter. Réglez la pression u réservoir 'expansion e façon qu'elle soit égale à la pression e remplis-
sage. Un réservoir 'expansion 'une taille supérieure peut être nécessaire.

2
BOILER
FF
EXPANSION
TANK
ZONE 1ZONE 2
V1
PV4
FIGURE 1:
MULTI-SPEED MODE
PREFERRED PIPING
FOR CIRCULATORS
ON BOILER SUPPLY
ZONE 1
V2
V3
P
ZONE 3
ZONE 2
V2
V3
P
ZONE 3
V2
V3
P
• AIR PURGING SEQUENCE
BY ZONE
LAST FIRST
BOILER
FF
EXPANSION
TANK
ZONE
1
ZONE
2
V1
PV4
ALTERNATE PIPING
FOR CIRCULATORS
ON BOILER RETURN
ZONE 1ZONE 2
V2V2
V3V3
PP
ZONE
3
ZONE 3
V2
V3
P• AIR PURGING
SEQUENCE
BY ZONE
LAST FIRST
KEY:
VI, V2, V3 = SHUT-OFF ISOLATION VALVE
P = TACO CIRCULATOR WITH IFC
FF = FAST FILL BOILER FEED VALVE
PV4 = PURGE VALVE
RECOMMENDED PURGING STEPS:
1. CLOSE V1, PV4, V2
2. OPEN V3
3. OPEN FF VALVE
4. OPEN V2, PV4, TO PURGE LAST ZONE
FIRST (ZONE 3)
5. CLOSE FF VALVE
6. CLOSE V2, PV4
7. REPEAT STEPS 1 TO 6 FOR EACH
ADDITIONAL ZONE, PURGE ZONE 1 LAST
8. OPEN V1 WHEN ALL ZONES ARE
PURGED
. ADJUST SYSTEM TO DESIRED OPERATING
FILL PRESSURE IF REQUIRED

BOILER
FF
EXPANSION
TANK
ZONE 1ZONE 2
V1
PV4
FIGURE 2:
MULTI-SPEED OR VARIABLE SPEED MODES
PREFERRED PIPING
FOR ZONE VALVES
ON BOILER SUPPLY
ZONE 1
V2
V3
ZONE 3
ZONE 2
V2
V3
ZONE 3
V2
V3
• AIR PURGING SEQUENCE
BY ZONE
LAST FIRST
BOILER
FF
EXPANSION
TANK
ZONE
1
ZONE
2
V1
PV4
ALTERNATE PIPING
FOR ZONE VALVES
ON BOILER RETURN
ZONE 1ZONE 2
V2V2
V3V3
ZONE
3
ZONE 3
V2
V3
• AIR PURGING
SEQUENCE
BY ZONE
LAST FIRST
P
P
ZV3 ZV2 ZV1
M
ZV1 ZV2 ZV3
MM
M
M
M
3
KEY:
VI, V2, V3 = SHUT-OFF ISOLATION VALVE
P = TACO CIRCULATOR WITHOUT IFC INSTALLED
FF = FAST FILL BOILER FEED VALVE
PV4 = PURGE VALVE
ZV = ZONE VALVE
RECOMMENDED PURGING STEPS:
1. CLOSE V1, PV4, V2
2. OPEN V3 AND ZV3
3. OPEN FF VALVE
4. OPEN V2, PV4, TO PURGE LAST ZONE
FIRST (ZONE 3)
5. CLOSE FF VALVE
6. CLOSE V2, PV4
7. REPEAT STEPS 1 TO 6 FOR EACH
ADDITIONAL ZONE, PURGE ZONE 1 LAST
8. OPEN V1 WHEN ALL ZONES ARE
PURGED
. ADJUST SYSTEM TO DESIRED OPERATING
FILL PRESSURE IF REQUIRED
10. MOVE ALL ZV TO CLOSED/AUTOMATIC
POSITION

4
ACCEPTABLE MOTOR MOUNTING POSITIONS CASING ROTATION
To rotate the casing, remove the 4 motor screws and spin
the casing to the desired flow direction. Reattach the 4
screws (5⁄32"allens wrench required). Be sure body gasket
is seated evenly to prevent leakage. Tighten motor
screws to 34-42 in-lbs torque.
WARNING: Use supply wires suitable for 90°C,
AVERTISSEMENT: Employer es fils ’alimentation a eqauts pour 90°C.
1. Location:
The circulator can be installed on the supply or return side of the boiler but for best system performance, it should always pump
away from the expansion tank. See piping diagrams in Figures No.1 and No. 2.
2. Mounting position:
Circulator must be mounted with the motor in the horizontal position. See diagrams below for acceptable motor mounting
orientations.
3. Fill the system with tap water or a maximum of 40% propylene-glycol an water solution:
The system must be filled before operating the circulator. The bearings are water lubricated and should not be allowed to operate
dry. Filling the system will result in immediate lubrication of the bearings. It is always good practice to flush a new system of for-
eign matter before starting the circulator.
4. Wiring the circulator:
Position electrical junction box at 9 o’clock position for best programming and viewing orientation. Casing
may be rotated to change flow direction. Locate the arrow on the casing body to determine flow direction.
CAUTION: To re uce the possibility of noise transmission, be sure to a vibration ampeners to piping when
mounting circulator to wall or floor joists.
ATTENTION: Pour ré uire la possibilité e transmission e bruit, veillez à ajouter es amortisseurs e vibration à la
tuyauterie lors u montage u circulateur sur es chevêtres e mur ou e plancher.
WARNING: Risk of electric shock. To re uce the risk of electric shock, be certain that it is connecte only to a prop-
erly groun e , groun ing-type receptacle. Follow all local electrical an plumbing co es.
AVERTISSEMENT: Risque e choc électrique. Pour ré uire le risque e choc électrique, veillez à ce qu'elle soit rac-
cor ée uniquement à un réceptacle e type mise à la terre proprement mis à la terre. Respectez tous les co es e
plomberie et électriques locaux.
Across a Series
Loop System Using
Zone Valves
M
M
M
Across Multi-Zone
Radiant Manifolds
with Loop Actuators
iSeries-R
B
C
A
B
C
A
MMMMMMMM
Outdoor
Sensor
Boiler
Sensor
Typical Variable Spee Applications:
• Zone Valves
•Panel Radiation with
Thermostatic Valves
•Radiant Loops with
Actuators
- Varies speed to
maintain proportional
or constant pressure
differential (∆P)
WARNING: Disconnect power when servicing.
CAUTION: Use flexible con uit only. Not for use with rigi con uit.
CAUTION: Do not use flat rubber gaskets. Only use O-ring gaskets provi e or leaks may result. Warranty will be voi .

NEUTRAL
TERMINAL BOX
LN
LINE
No ground wire required.
Green Terminal Plug
Spring Tabs
5
•Disconnect AC power supply. Remove terminal box cover. Attach a wiring connector into
knockout hole. Use flexible conduit only. Connect line and neutral wire to green terminal
plug as shown in diagram. Depress the spring tab with a small screwdriver to insert wire
into plug. Release tabs to complete connection. The VR1816 is a double insulated cir-
culator, no grounding wire is necessary. Replace terminal box cover.
5. Start the circulator:
It is recommended to run the circulator at full speed for a minimum of 5 minutes when purging the system to remove remaining air from
the bearing chamber. This is especially important when installing the circulator in the off-season.
Full Spee Operation:
To run the pump at full speed during the fast fill, start-up and purge process, rotate dial to max speed setting. To return to the normal
operating mode, turn dial to desired fixed speed, constant pressure, or proportional pressure setting.
6. Programming your VR1816 circulator:
Note: The VR1816 is factory-programmed for maximum speed operating mode. If this is your desired operating mode, no pro-
gramming changes are required.
To change operating mo e an settings:
Modify the performance of the circulator (head) as needed by rotating the dial using a flat screwdriver. The LED will flash each
time mode is changed. See diagrams below to determine best mode of operation for the system.
The selection of the right functioning curve depends on the characteristics of the heating system in question and the actual
heat demand.
CAUTION: Never run the circulator ry or permanent amage may result.
ATTENTION: Ne laissez jamais le circulateur tourner à sec, es ommages permanents peuvent en résulter.
The VR1816 has 3 Operating Mo es:
• Fixe Spee ( ) - Infinitely a justable settings (min-max).
• Constant Pressure ( ) - Varies spee to maintain a constant pressure ifferential.
• Proportional Pressure ( ) - Varies spee to maintain a proportional/variable pressure ifferential.
WARNING: SERVICING OF DOUBLE-INSULATED APPLIANCES. A ouble-insulate appliance is marke with one or
more of the following: The wor s “DOUBLE INSULATION” or “DOUBLE INSULATED” or the ouble insulation sym-
bol (square within a square). In a ouble-insulate appliance, two systems of insulation are provi e instea of
groun ing. No groun ing means is provi e on a ouble-insulate appliance, nor shoul a means for groun ing be
a e . Servicing a ouble-insulate appliance requires extreme care an knowle ge of the system, an shoul be
one by qualifie service personnel. Replacement parts for a ouble-insulate appliance must be i entical to the
parts they replace.
Min
Max
Q(gpm)
012 3 4567 8 910111213141516
H (ft)
0
2
4
6
8
10
12
14
16
18
20
Q (l/s)
0.0 0.2 0.4 0.6 0.8 1.0 1.2
H (m)
0
1
2
3
4
5
6
Q (m3/h)
4
3
2
1
0
0015 – Hi
008
0015 – Med
007
0015 – Low
006
003
Flow
Head in Feet
FIXED SPEED MODE ( ) – Infinitely Adjustable (Min-Max)
Fixed speed mode ( ) allows the installer to fine tune the circulator flow rate to precisely match design load conditions. It is
infinitely variable between min/max settings. See chart above for equivalent 00 model at each variable speed setting.
Shaded area represents full
operating range.
Blue
LED
min -
max

CAUTION: Do not attempt to remove LED panel from circulator. Serious amage to circulator electronics may
result.
ATTENTION: N'essayez pas e retirer le panneau e LED u circulateur. Des ommages sérieux à l'électron-
ique u circulateur peuvent en résulter.
6
5
10
15
Max
Q(gpm)
01234567 8 910111213141516
H (ft)
0
2
4
6
8
10
12
14
16
18
20
Q (l/s)
0.0 0.2 0.4 0.6 0.8 1.0 1.2
H (m)
0
1
2
3
4
5
6
Q (m3/h)
432
1
0
008
0015 – Med
007
0015 – Low
006
Flow
Head in Feet
CONSTANT PRESSURE MODE ( ) – Variable Speed
In Constant pressure mode ( ), the circulator maintains a constant pressure differential (∆p-c) in the system as heating load
increases or decreases. Selection options are 5, 10, or 15 feet of head constant pressure. Seee chart above for equivalent 00
model at each setting.
Low
Med
High
Max
Q(gpm)
01234567 8 910111213141516
H(ft)
0
2
4
6
8
10
12
14
16
18
20
Q (l/s)
0.0 0.2 0.4 0.6 0.8 1.0 1.2
H (m)
0
1
2
3
4
5
6
Q (m3/h)
43
2
10
Flow
Head in Feet
PROPORTIONAL/VARIABLE PRESSURE MODE ( ) – Variable Speed
In Proportional/variable pressure mode ( ), the circulator maintains a proportional pressure differential (∆p-v) as heating load
increases or decreases. Flow will change in relationship to the change in pressure differential. Selection options are Low,
Medium, or High. If unsure on proper setting, select Medium and adjust as needed.
Orange
LED
Green
LED

7
7. Troubleshooting the error co es:
Listed below are potential diagnostic error codes which will appear on the LED display in case of a malfunction.
FAULTS CONTROL
PANEL CAUSESREMEDIES
The circulator is
noisy
LED on Suction pressure is
insufficient - cavitation
Increase the system suction
pressure within the
permissible range.
LED on Presence of foreign bodies
in the impeller
Disassemble the motor and
clean the impeller.
Loud noises of
water circulation
Flashing white
LED Air in the system Vent the system. Repeat
fill and purge steps.
LED on The flow is too high Reduce the pump speed.
Circulator is not
running although
the electrical
power supply is
switched on
LED off
Lack of power supply
Verify voltage value of the
electric plant.
Verify the connection of the
motor.
One fuse in the installation
is blown Verify the fuses of the plant.
The circulator is defective Replace the pump.
Overheating
Let the pump cool down for
some minutes. Then try to re-
start it. Verify that the water
and ambient temperature are
within the indicated
temperature ranges.
LED red The rotor is blocked
Disassemble the motor and
clean the impeller. See
unlocking procedure below.
Insufficient supply voltage
Verify that the power supply
matches the data on the name
plate.
Building does not
get warm. LED on The circulator
performance is too low
Increase the suction head.
Increase speed or ∆P setting.
Unlocking Proce ure:
A red light in the LED indicates the circulator is locked or sticking. Turn the selector to the position MAX, disconnect and con-
nect power supply to start the automatic release process. The circulator makes 100 attempts to restart (process lasts approx-
imately 15 minutes). Every restart is signalled by a short flash of LED light. If the locking is not removed through the automat-
ic release process after 100 attempts to restart the circulator, it goes into standby and the LED remains red. In this case follow
the manual procedure described in the next steps: during any attempt, the red LED light keeps blinking; after that the circula-
tor tries again to start. If the locking is not removed through the automatic release process (the warning light returns to be red),
perform the manual steps described below.
1. Disconnect power supply - the warning light switches off.
2. Close both isolating valves and allow cooling. If there are no shut-off devices, drain the system so that the fluid level is
beneath that of the circulator.
3. Loosen 4 motor bolts. Remove motor from casing. Carefully pull the rotor/impeller from the motor.
4. Remove impurities and deposits from the impeller and casing.
5. Reinsert the rotor/impeller into the motor.
6. Set the dial to the MAX position.
7. Connect power supply. Check for impeller rotation.
8. If the circulator still doesn’t run it will need to be replaced.

LIMITED WARRANTY STATEMENT
Taco, Inc. will repair or replace without charge (at
the company’s option) any Taco High Efficiency
circulator or circulator part which is proven
defective under normal use within three (3) years
from the date of manufacture.
In order to obtain service under this warranty, it
is the responsibility of the purchaser to promptly
notify the local Taco stocking distributor or Taco
in writing and promptly deliver the subject product
or part, delivery prepaid, to the stocking distrib-
utor. For assistance on warranty returns, the
purchaser may either contact the local Taco
stocking distributor or Taco. If the subject prod-
uct or part contains no defect as covered in this
warranty, the purchaser will be billed for parts
and labor charges in effect at time of factory
examination and repair.
Any Taco product or part not installed or operated
in conformity with Taco instructions or which
has been subject to misuse, misapplication, the
addition of petroleum-based fluids or certain
chemical additives to the systems, or other
abuse, will not be covered by this warranty.
If in doubt as to whether a particular substance
is suitable for use with a Taco product or part, or
for any application restrictions, consult the
applicable Taco instruction sheets or contact
Taco at (401-942-8000).
Taco reserves the right to provide replacement
products and parts which are substantially similar
in design and functionally equivalent to the
defective product or part. Taco reserves the right
to make changes in details of design, construc-
tion, or arrangement of materials of its products
without notification.
TACO OFFERS THIS WARRANTY IN LIEU OF
ALL OTHER EXPRESS WARRANTIES. ANY
WARRANTY IMPLIED BY LAW INCLUDING
WARRANTIES OF MERCHANTABILITY OR
FITNESS IS IN EFFECT ONLY FOR THE DURA-
TION OF THE EXPRESS WARRANTY SET
FORTH IN THE FIRST PARAGRAPH ABOVE.
THE ABOVE WARRANTIES ARE IN LIEU OF
ALL OTHER WARRANTIES, EXPRESS OR
STATUTORY, OR ANY OTHER WARRANTY
OBLIGATION ON THE PART OF TACO.
TACO WILL NOT BE LIABLE FOR ANY SPE-
CIAL, INCIDENTAL, INDIRECT OR CONSE-
QUENTIAL DAMAGES RESULTING FROM THE
USE OF ITS PRODUCTS OR ANY INCIDENTAL
COSTS OF REMOVING OR REPLACING
DEFECTIVE PRODUCTS.
This warranty gives the purchaser specific
rights, and the purchaser may have other rights
which vary from state to state. Some states do
not allow limitations on how long an implied
warranty lasts or on the exclusion of incidental
or consequential damages, so these limitations
or exclusions may not apply to you.
Do your best work.®
TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: [phone] FAX: [phone].
TACO (Cana a), Lt ., 8450 Lawson Road, Unit #3, Milton, Ontario L9T 0J8. Telephone: [phone]. FAX: [phone].
Visit our web site at: http://www.taco-hvac.com
Printed in USA
Copyright 2014
TACO, Inc.
8
SPEED TACO GRUNDFOS WILO B & G/XYLEM ARMSTRONG
Minimum 003
006
-
Alpha 15-55 (1) -- Eco-Vario (Low) Compass-1
Medium
007
008
0015-1
0015-2
UP-15-42
UPS-15-58-1
UPS-15-58-2
Alpha 15-55 (2)
Star S-21-1
Star S-21-2
NRF-25-1
NRF-25-2
Eco-Vario (Med)
Astro 230-1
Astro 230-2
Compass-2
Maximum 0015-3 UPS-15-58-3
Alpha 15-55 (3) Star S-21-3 NRF-25-3 Eco-Vario (Hi)
Astro 230-3
Compass-3
VR1816 Pump Cross Reference (Constant Spee Mo e):
TACO GRUNDFOS WILO B & G/XYLEM ARMSTRONG
VR1816 Alpha 15-55 Stratos Eco Eco-Auto Compass 20-20
VR1816 Pump Cross Reference (Variable Spee Mo e):