York AFFINITY OptiHeat YAW040, Installation Manual

18

Accessories and Options

IntelliStart (Model 040 only)

IntelliStart is a single phase compressor soft starter which 
reduces the normal start current (LRA) by 60-70%. It should 
be used in applications that require low starting amps, 
reduced compressor start-up noise, off-grid, and improved 
start-up behavior. IntelliStart is available as a factory 
installed option or a field installed kit. IntelliStart is available 
on 208-230/60/1 voltage.

Water Connection Kits (Field Installed)

Water connection kits are available to facilitate loop side and 
load side water connections.

• MA4FPT 

- 

Forged brass 1" MPT x 1" FPT square street elbow 

with P/T plug for 040 water side connections

• MA5FPT 

- 

Forged brass 1.25" MPT x 1.25" FPT square 

street elbow with P/T plug for 050-066 water side 
connections

• WFI-HKM-100-24-MO

 - 1 inch x 24 inch stainless steel 

braided hose kit

• WFI-HKM-125-24-MO

 - 1 

1

⁄

4

 inch x 24 inch stainless steel 

braided hose kit

Earth Loop Pump Kit (Field Installed)

A specially designed one or two-pump module provides all 
liquid flow, fill and connection requirements for independent 
single unit systems (230/60/1 only). The one-pump module 
(FC1-FPT or FC1-GL) is capable of 25 feet of head at 12.0 
GPM, while the two-pump module (FC2-FPT or FC1-GL) is 
capable of 50 feet of head at 12.0 GPM.

Load-side Pump Kit (Field Installed)

Four (4) load pump kits are available to provide all liquid 
flow requirements for independent single unit systems 
(230/60/1 only). Part number 

24S516-10

 (Grundfos UPS15-

42RU) is a composite body pump.  

EWPK2

 (Grundfos 

UP26-99SF) is stainless steel body pump.  Part number 
EWPK1 and EWPK3 come with a cast iron body pump 
(Grundfos UP26-99F) that can be used for hydronic 
heating applications.

Calculate the system pressure drop then refer to the 
pump curves in figure 8 to select the proper pump. All 
four (4) of the pump kits can be used for hydronic heating 
applications as long as they meet the flow requirements. 
If the flow requirements are outside the pump curve, an 
alternate pump will need to be obtained to maintain the 
necessary flow.

• 24S516-10

 - UPS15-42RU composite PPS, 

3

⁄

4

 inch union

sweat connection

• EWPK1

 - UP26-99F cast iron volute, 1 inch FPT

flange connection

• EWPK2

 - UP26-99SF Stainless Steel volute, 1 inch FPT

flange connection

• EWPK3

 - UP26-99F cast iron volute, 1-

1

⁄

4

 inch FPT

flange connection

Figure 8:

 UPS15-42RU and UP26-99F Pump Curve

UPS15-42RU, and UP26-99F Single Pump Curve

26-99F Two Pump Curve

0 

5 

10 

15 

20 

25 

30 

35 

0  5  10 15 20 25 30 35 

Feet of Head 

GPM 

Pump Curve - Single Pump 

UP26-99F 

UPS15-42RU 

0 

10 

20 

30 

40 

50 

60 

70 

0  5  10 15 20 25 30 35 

Feet of Head 

GPM 

Pump Curve - Two Pumps 

UP26-99F (2 pumps) 

NOTE:

 Never use piping smaller than 1 inch. Limit length of 

pipe to 50 feet or less.

Type L Copper Tube

GPM

3/4

1

1-1/4

1-1/2

2

2

1.5

3

3.2

4

5.5

1.4

5

8.5

2.1

6

2.9

1.1

7

3.9

1.4

8

5.0

1.8

9

6.1

2.3

0.9

10

7.5

2.8

1.1

12

3.9

1.6

14

5.2

2.1

16

6.6

2.7

18

8.2

3.4

20

10.0

4.1

1.1

22

5.0

1.3

25

6.3

1.6

30

2.2

35

2.9

40

3.8

45

4.7

50

5.7

Type L Copper Pressure Loss

Ft of Hd per 100 ft

NOTE:

 Standard piping practice limits pressure drop to 4 

feet of hd per 100 feet in 2 inch and larger pipe.

 AFFINITY SINGLE STAGE HYDRONIC WITH OPTIHEAT INSTALLATION MANUAL